Ben Miller is going to guest star in the new 'Doctor Who' series.
The actor, best known as one half of comedy duo Armstrong and Miller and for starring in ITV drama 'Primeval', will appear opposite Peter Capaldi when he kicks off his first series as the new incarnation of the Time Lord this autumn.
Ben enthused: "As a committed Whovian I cannot believe my luck in joining the Twelfth Doctor for one of his inaugural adventures. My only worry is that they'll make me leave the set when I'm not filming."
The 48-year-old star has been cast as the baddie in an episode written by Mark Gatiss and rose to the occasion by putting on a terrifyingly villainous performance.
Steven Moffat, the BBC One show's head writer and executive producer, commented: "Mark Gatiss has written us a storming villain for his new episode, and with Capaldi in the TARDIS, we knew we needed somebody special to send everybody behind the sofa.
"And quite frankly, it's about time Ben Miller was in 'Doctor Who'!"
The actor's comedy partner Alexander Armstrong has previously joined the last of the Time Lords on his intergalactic adventures during the 2011 Christmas special.
Ben was last seen as DI Richard Poole in the first two series of the BBC's 'Death In Paradise'.

Christian Clarke will return to 'EastEnders' for Lucy Beale's funeral.
Actor John Partridge has reprised his role as Jane Beale's brother for the emotional scenes, marking his return to Walford after nearly a year and a half.
Christian - who initially left Albert Square in November 2012 with partner Syed Masood - will be back on screens in May to offer support to Ian Beale's ex-wife Jane, played by Laurie Brett, who was Lucy's stepmother and developed a close bond with all of Ian's children.
New pictures show Christian attending Lucy's funeral with the young businesswoman's distraught father Ian (Adam Woodyatt), twin brother Peter (Ben Hardy), and half-siblings Bobby and Cindy.
Lucy, played by Hetti Bywater, will be killed off on Good Friday (18.04.14) and her lifeless body is set to be discovered on Walford Common.
The shock death will begin a 'whodunit?' storyline that will see many Walford residents suspected of Lucy's murder, but viewers will have to wait until next February for the culmination of the plot as it will tie in with the soap's 30th anniversary.
Meanwhile, actress Hetti has admitted it's "scary and overwhelming" to be involved in such an important storyline.
She told Digital Spy: "It's a bit scary and overwhelming, and the fact that it's going to go on for so long. I am ecstatic that I got given this opportunity, because it's amazing and challenging and great to be part of such a big storyline."

Eminem and Rihanna are set to perform 'Monster' at the 2014 MTV Movie Awards. The two pop stars have been confirmed to take to the stage at the Nokia Theater in Los Angeles this Sunday (13.04.14), where they will sing their number one hit single, 'The...

50 Cent has lost a lawsuit against a headphones company who have sued him for $16.1 million.
The 'Candy Shop' rapper, real name Curtis Jackson, has been ordered by a judge to pay the sum to Sleek headphones after a planned deal to market his own range with the company fell through.
According to RadarOnline.com, the star invested more than $1 million to start his line, before deciding the create another set of headphones with a different company.
Court documents reportedly show Sleek were "stunned" when they found the 'Sync by 50' headphones were "basically the same design, mechanically" as the pair they had developed.
Sleek also claimed the rapper and his assistants stole confidential information from a website they developed to promote the headphones before they were produced.
The site featured 3,639 potential customers' email addresses and other data, which "disappeared" after 50's team was given the password.
The court heard it was "very valuable information", but when Sleek emailed the rapper's team to discuss the issue, his business manager Nicole Martin wrote, "[Sleek] is onto us, LOL. They emailed and called ... about the data. (sic)"
Another member of 50's team also sent an email to a colleague, saying: "Tell him something like, sorry, you just have to finish editing a video for 50 or something, we'll get to it, LOL (sic)"
Court documents show Sleek sued the rapper for breaching his fiduciary duty, participating in a civil conspiracy, misappropriating trade secrets, breaching his confidentiality agreement and being unjustly enriched.
The rapper instead claimed Sleek "fraudulently induced" him into entering into an investment and breaching their fiduciary duties to him.

Nicole Appleton was granted a divorce from Liam Gallagher within 68 seconds of the judge assessing the case.
The All Saints singer has endured a turbulent several months after it was revealed last July that her husband had fathered a child with American journalist Liza Ghorbani during an affair, but there was a swift conclusion to their legal separation which was heard at the Principal Registry of the High Court in London by Judge Anne Aitken on Tuesday (08.04.14).
The case - titled Appleton N M v Gallagher L J P - was the second of 13 undefended cases analysed by the judge and according to court papers Nicole said Liam "admitted adultery to me prior to it becoming publicised in national newspapers" and following his confession it became "intolerable" for her to live with him.
Liam, 41, confessed to cheating in the legal papers that were filed, answering "yes" when he was quizzed on the topic and he agreed to pay Nicole, 39, "reasonable costs" bringing an end to their six-year marriage and 14-year relationship.
The former Oasis singer - who has 12-year-old son Gene with the blonde beauty - was also revealed to be having an affair with his current band Beady Eye's ex-manager Debbie Gwyther, whom he is now living with.
The 'Wonderwall' singer also has two other children, 16-year-old daughter Molly, who he fathered during a brief fling with singer/songwriter Lisa Moorish, and 14-year-old Lennon, his son with first wife Patsy Kensit.

Fifi Geldof has paid tribute to her late sister Peaches.
Bob Geldof's eldest daughter has shared her heartbreak over the death of her younger sister, who tragically passed away at her home in Kent, England, yesterday (07.04.14) at the age of 25.
Fifi, 31, shared an old family picture of herself and Peaches as children and captioned it: "My beautiful baby sister ... Gone but never forgotten. I love you, Peaches x (sic)"
Fifi and Peaches are the daughters of Boomtown Rats legend Bob and late model Paula Yates. They have a younger sister, Pixie, 23, and a half-sister, Tiger Lily, who is Paula's daughter with Michael Hutchence.
Meanwhile, more celebrity tributes have poured in for Peaches, who is survived by her two sons, Astala and Phaedra, with her husband Thomas Cohen.
'Royals' singer Lorde, 17, hailed Peaches qualities as a person, writing on Twitter: "You were a sparkling, lovely person who showed me such kindness. rest easy, peaches (sic)"
Music mogul Simon Cowell, 54, shared his condolences, writing: "The few times I met Peaches she was a sweet, funny warm person. Much love to her family she has left behind."
Paris Hilton said: "So sad to hear the news about Peaches Geldof. She was such a beautiful & special soul. My thoughts & prayers go out to her family. RIP (sic)"
Tributes have poured in from around the world, including the music industry and even Hollywood.
Actress Susan Sarandon wrote: "No words can express any comfort at the loss of a child and mother as beautiful as Peaches Geldof. God bless."
Boy George was left stunned by the news of his pal and offered his condolences to Peaches' father.
He wrote: "Poor sweet Peaches Geldof. We spoke only a month ago and she looked like an angel. This is truly sad. Poor Bob! R.I.P (sic)"

Lady Gaga wowed in fishnet tights and a green wig as she gave her final performance at the Roseland Ballroom in New York City.

Maria Menounos looked lovely in a lace fuchsia dress as she chatted to fans following the filming of the 'Extra' show at Universal Studios in Los Angeles.

Ashley Tisdale showed off the results of her work-out in skin-tight leggings and a vest as she left her yoga class in Studio City, Los Angeles.

Heidi Klum looked stunning in a cream sweater and black jeans as she arrived in LA. The supermodel was joined by her mother, Erna, as she made her way out of LAX Airport.

Lindsay Lohan looked cheerful as she arrived at The Late Show with David Letterman. The actress wore a quirky piano-inspired dress and trilby as she smiled for fans outside the Ed Sullivan Theatre in New York.

Olivia Palermo was joined by her pet pooch as she hit the shops in Brooklyn, New York. The socialite opted for a casual look, teaming a red parka with leggings and trainers.