Britain's Prince Charles has become patron of the Cystic Fibrosis Trust.
The Prince of Wales is "delighted" with the opportunity to get involved with the charity, which helps improve the lives of people affected by the genetic disorder in the UK, as the organisation celebrates its 50th anniversary.
The royal heir is taking over the patronage from Queen Elizabeth's cousin, Princess Alexandra, who has held the position for the last 47 years.
Charles commented: "Having for so long felt deeply about the suffering of cystic fibrosis patients, I am delighted to take on patronage of the Cystic Fibrosis Trust from Princess Alexandra in this, the Trust's 50th year.
"By funding ground-breaking research, improving the quality of care and providing invaluable advice and support, the Trust carries out extraordinary work on behalf of the 10,000 people with cystic fibrosis in the United Kingdom."
The 65-year-old future king's new role will officially be announced at a special gala dinner on 8 May.
The Chairman of the Cystic Fibrosis Trust has also thanked Alexandra for her hard work improving research, care and advice for sufferers of the hereditary disorder, which most commonly affects the lungs, pancreas, liver, and intestines.
According to HELLO! magazine, George Jenkins OBE said: "We are extremely grateful to HRH Princess Alexandra for her support for the Trust over so many years.
"She has been a very important part of our organisation for most of its history, and on behalf of the whole of the cystic fibrosis community in the UK I wish to thank her for the wonderful support she has provided over this time."

Britain's Duchess Catherine's engagement ring has increased over tenfold in value.
The 32-year-old royal's 12-carat blue sapphire ring, which was handed down from the late Princess Diana, is estimated to be worth a whopping £272,000 more than it was when Catherine wed Prince William in April 2011 at London's Westminster Abbey.
The precious jewel was first given to the Princess of Wales by Prince Charles in 1981 after he purchased it for £28,000, but is now valued at a staggering £300,000.
The heirloom - which also boasts 14 diamonds encircling the sapphire - is worth three times more than the Queen's own engagement ring, which came in second place on a list of the world's top 20 most famous rings, ranked according to how much their value has increased.
Vashi Dominguez, the ITV 'This Morning' jewellery expert who compiled the list, commented: "The Duchess of Cambridge's ring has appreciated more quickly than any other ring in the list.
'It's Kate's style icon status that makes the ring so special."
The second most expensive of the royals' rings actually belongs to the Duchess of Cornwall, Prince Charles' second wife.
The Art Deco bling, valued at £100,000 at the time of their 2004 wedding, is worth £250,000 today and placed ninth on the list.
As for Queen Elizabeth's three-carat diamond solitaire engagement ring, it has increased in value from £10,000 to £100,000 since Prince Philip got down on one knee in 1947.

Hayley Atwell's 'Agent Carter' TV series has been ordered for a full series. American TV network ABC has commissioned the Marvel spin-off show, which will see the British actress reprise her role as Peggy Carter from smash hit 2011 movie 'Captain Amer...

Jeff Hordley says "being bad" is in his 'Emmerdale' character's DNA.
The 44-year-old actor first joined the ITV soap as Cain Dingle in the year 2000, taking a three-year break in 2006 before returning in 2009, and although he says his character has softened a bit, he claims he hasn't completely turned his back on being a bad boy.
He told The Sun newspaper: "Don't get me wrong, he's not going completely soft - being bad is in Cain's DNA. But he can't be cartoon evil all the times. It would be boring for me and the viewers.
"By the time I left in 2006 he was getting a bit like that. It was a bit predictable and I was a bit bored, if I'm honest.
"Going away allowed things to change and Cain had room to develop."
Cain is currently preparing for his wedding to girlfriend Moira Barton (Natalie Robb) and Jeff is enjoying having fans on his side for once.
He explained: "There was a time when people used to come up to me in the street and tell me off about what Cain was up to.
"Now they come up and say, 'I don't like that Ross Barton' or, 'Watch out for that James!'
"He's got a backstory and viewers are more understanding of him. Yes he's done bad things - thieving, affairs, violence, all of that - but now people know why."

Simon Cowell has admitted 'The X Factor' musical "didn't work out".
'I Can't Sing', which was written by comedian Harry Hill, will close this weekend after just two months on stage at the London Palladium, and Simon has blamed its failure on being too ambitious by going into a major theatre.
He told Digital Spy: "We took a punt and it didn't work out. If I could do things different, I would have gone to local theatres and built up a following. We went in too big a theatre - it's the biggest theatre in the West End."
'I Can't Sing' received positive reviews for its satirical take on 'The X Factor' and its stars, including Simon - played by Nigel Harman - Cheryl Cole, Louis Walsh and host Dermot O'Leary.
The story centres on a young Londoner, Chenice, who reluctantly auditions for 'The X Factor' and is catapulted to fame.
Leading lady Cynthia Erivo recently insisted she is incredibly proud of 'I Can't Sing', despite it's unceremonious axe.
She said: "We've had the best time. The whole run has been wonderful and we've had brilliant responses. We'll finish with a sparkle and we won't be forgotten easily.
"I think that it's nice that things have the chance to get to the West End, for six weeks or six months."

The cast of 'The Only Way Is Essex' are set to film a spin-off show in Ibiza.
The ITV2 reality show already has already seen the likes of Mario Falcone, Jessica Wright, Ricky Rament and James Argent film in Marbella and Las Vegas for spin-off shows and now they are heading to the party island.
A source told the Daily Mirror newspaper: "They are planning to film on the island towards the end of the summer.
"It will mix it up a bit and a lot of the cast go out there a few times every summer anyway.
"The cast have been desperate to get them to film out there for years."
The last time the cast were holidaying in Ibiza back in July last year, James 'Diags' Bennewith and newbie Fran Parman hit it off and were seen frolicking in the pool of Ocean Beach in the party capital.
The soon-to-be housemates were seen kissing while taking a dip and the situation soon developed into a love triangle between the pair and friend Tom Pearce, who asked Fran out on a date.
Viewers will be expecting plenty of drunken scenes and flings during the spin-off show when they head back to Ibiza.

Cilla Black will receive the BAFTA Special Award at the British Academy Television Awards.
The iconic TV star and singer will be honoured for her "outstanding" contribution to British television in a career spanning 50 years.
Cilla will be awarded the prize on Sunday, May 18, at the annual BAFTA TV Awards, held in London's Theatre Royal, Drury Lane.
The flame-haired star said in a statement: "I am thrilled to be honoured with this award. I am totally delighted. I've been very fortunate to have a long and full career in television and this means the world to me."
BAFTA TV committee chairman Andrew Newman added: Andrew "Cilla Black is a true icon in the television and entertainment industry. From hosting her own show for the BBC in '68 to defining ITV entertainment throughout the '80s and '90s, Cilla has been an extremely popular and hugely influential entertainer throughout her long career in television.
"Last year she celebrated her half-century in show business and we are thrilled that she will receive this year's Special Award at the Arqiva British Academy Television Awards on Sunday 18 May."
Beginning her career as a singer - managed by the man behind The Beatles - Cilla, 70, went on to become a staple of British TV with hit shows such as 'Blind Date' and 'Surprise Surprise'.
Previous BAFTA TV Special Award winners include Simon Cowell, Clare Balding, Jon Snow and Murray Walker.

Reese Witherspoon thinks it is important a man can "whisper" a girl's name.
The 38-year-old actress - who is married to Hollywood agent Jim Toth and was previously wed to her 'Cruel Intentions' co-star Ryan Phillippe - was caught on camera at the Met Ball on Monday (05.05.14) by model Cara Delevingne giving out love advice to friends including Kate Upton and Zooey Deschanel.
In the clip, which has since been deleted from Cara's Instagram account, she says: "[You know] what's the most important thing in a name -- for a girl? It's that a man can whisper it into his pillow."
In the clip, which was recorded in an elevator at the Metropolitan Museum of Art in New York, Reese had begun by declaring her love for the British model - but admitted she had problems pronouncing her name.
She said: "If you force me to say your last name, I'll be f***ed. I love you Kara. Cara. I don't know what your f***ing name is. That stupid French."
However, she then looked up from her cell phone straight into the camera and pronounced the 21-year-old model's name perfectly.
Cara had uploaded the video with the caption 'the confusion', posting: "The confusion @reesewitherspoon @zooeydeschanel @tennesseebunny @kateupton #HAHAHAHA #loveyouladies (sic)"

Michael Douglas and Catherine Zeta-Jones are "doing great".
The couple took a break from their 13-year relationship last August, but the 'Behind the Candelabra' star says they now have things back on track.
He said: "I think we're always working it out. Two people choose to work it out, we're doing great thank you. We're very close and everything's going great."
The 69-year-old actor - who has son, Dylan, 13, and daughter, Carys, 11 with Catherine, 44, as well as grown-up son Cameron from his marriage to Diandra Douglas - says he has learned not to take his wife for granted and his attention is focused more on her than anyone else.
Speaking to Gayle King for 'Entertainment Tonight', he said: "You don't take love for granted... Sometimes we spend more efforts with people that are strangers in terms of making an impression than the person that's closest to us. And you just gotta remember not to take for granted that person that's closest to you."
Meanwhile, Michael has suffered an injury after "getting carried" away at his son's recent Bar Mitzvah, a ceremony which marked Dylan's coming-of-age into the Jewish faith.
Referring to the horah, a type of dance where the honouree and their family members are raised up on chairs, Michael told the New York Post newspaper:
"I'm hurting. I don't know whether it's my groin or a hernia. I got carried away at my son's bar mitzvah this weekend. You know they put you up in the chairs over the top -- I think something happened there."

Mila Kunis is planning to have a drug-free natural birth.
The 'Black Swan' actress is expecting her first child with fiance Ashton Kutcher and has vowed not to have a pain-numbing epidural injection to ease her labour, which may take place at home.
Speaking about her pregnancy for the first time, she said: "We thought about a home birth, we watched a couple of documentaries and spoke to some midwifes and people, and realised our hospital have the midwives and doulas who can do that.
"I'm going to do it as natural as I can, No epidural, I'm crazy, right. But I wanted this! I did this to myself, I might as well do it right. Well, I did have a little help..."
The brunette beauty also admitted Ashton has been so prepared during her pregnancy, he even stocked up on "goofy" foods he thought she might experience cravings for.
She told TV talk show host Ellen DeGeneres: "He assumed that I was gonna have goofy cravings, so he stocked our secondary fridge with weird food. Just like pickles, and sauerkraut, or like anchovies, and ice creams...just in case at one point during this pregnancy I'd be like I really want something.
"And it happened last week, I was like, 'Oh my God, I need a pickle.' It was just the weirdest thing.
"I needed this pickle and he was like, 'Hold on a second' and disappeared in the backyard and came back with the most amazing dill pickle of all time."
Ashton, 36, is also taking Russian lessons so he can communicate with the baby in Ukranian-born Mila's native tongue.
She said: "He's been taking classes for six months, he does it twice a week, a woman comes to the house and gives him lessons."
And the 30-year-old star admitted she and the 'Two and a Half Men' star - who was previously married to Demi Moore - were engaged for some time before it became public knowledge.
She said: "We were able to keep this private for two months without anybody knowing, I think everybody assumed we were engaged for so long that I was wearing the ring in public for two months and nobody commented on single photograph."

Dean McDermott has splashed out on a vintage ring as a wedding anniversary gift to Tori Spelling.
The reality TV star - who is currently fighting to save his marriage to the actress after admitting cheating on her last year - bought a hand-engraved, Renaissance-inspired ring, which is set in 18-carat gold with pear-shaped sapphires, square-cut rubies and greenish yellow peridots, from celebrity jeweller Neil Lane as he wanted a "meaningful" present for his wife of eight years.
Neil told People: "Dean wanted to keep tradition and celebrate their anniversary and 'love story' with a very special, beautiful ring set in gold -- and this one is really cool with lots of colour.
"He loved the multi-color and he wanted gems. It's very stylish and different. He wanted to get a really special jewel, something meaningful -he wanted to show up for Tori with a beautiful ring."
And Dean - who buys a ring for Tori every anniversary - was delighted his choice was a hit with his spouse.
Neil added: "Dean seemed really excited to give her the ring. And he texted me and said Tori was thrilled, that she loved it. He said it was her favourite ring of all the years!"
Dean - who has children Liam, seven, Stella, five, Hattie, two, and Finn, 20 months, with Tori - was also seen shopping for gifts at Victoria's Secret earlier this week and on Wednesday (07.05.14), the day of their anniversary, the couple enjoyed an intimate sushi dinner at Los Angeles eatery Katsuya.

John Tiffany is in talks with J. K. Rowling to helm a Harry Potter play.
The stage director - who has worked on 'Black Watch' and 'Once' - is in the "early stages" of negotiations with the famed author, who penned the series of novels about the famous wizard boy, as they plan to take the story, which follows Harry in his younger years, to the theatre.
The production will follow Harry as an orphan and outcast and also explore his parents, Lily and James, who were killed by the dark Lord Voldemort when he was just 15 months old, reports the Daily Mail newspaper.
Meanwhile, playwright Jack Thorne, 35, is also being "actively" pursued and while "Rowling has met both men", "discussions have not been concluded."
Rowling, 48, won't be writing the show, but she will be collaborating.
She will also co-produce, alongside Sonia Friedman and Colin Callender.
Warner Bros, the studio behind the movies, which starred Daniel Radcliffe as Harry and Emma Watson and Rupert Grint as his pals Hermione Granger and Ron Weasley respectively, will also be involved.
A top executive at Warner's said: "We will see what we have when it's written, and proceed from there. Remember, it's a play, not a musical, so we may not require a great big theatre."