Simon Cowell finds David Walliams "annoying" on this year's 'Britain's Got Talent'.
The TV boss and music mogul, who is on the judging panel with the comedian, along with Amanda Holden and Alesha Dixon, insists their on-screen banter has become too much.
He said: "He's really got annoying this year. He was kind of amusing before but God forbid I make the audience laugh more than he does - he gets quite dark."
Asked if he actually likes David, he replied: "I was thinking about it when I was working with him - it's like having a child who's suddenly turned into a giant at the age of 11. He is mentally an 11 year old in this huge body. He has got a kind side but he can be very, very annoying to work with."
Simon admits he noticed Alesha and Amanda had a "girl power" pact last year and fears they could gang up against the men once again.
He said: "I did notice this awful pact between the two girls last year and the so-called girl power, and I think they will probably do the same thing again!"
The 54-year-old star also claims he isn't always impressed by people's back stories in auditions, especially when it comes to contestants not having any skills.
He said: "I'm put off when it becomes more important than their talent and I hate it when people are actually revelling in their back stories. Sometimes they don't even have an audition, they just come with a back story and can't actually do anything!

Ade Edmondson says it is "unlikely" he will work with his comedy partner Rik Mayall again.
The duo enjoyed a working relationship which spanned across three decades beginning in the 1980s and produced acclaimed comedy TV shows 'The Young Ones', 'Filthy Rich & Catflap' and 'Bottom'.
Ade and Rik haven't collaborated together since the early 2000s and the 57-year-old funnyman doesn't see a reunion on the cards.
The 'Ade at Sea' star told BANG Showbiz: "I think it's very unlikely, just because we worked together for nearly 30 years and I kind of called a stop to it because I just wanted to do other stuff. I love everything we did together - I'm really proud of it - it's just that I want to experience lots of things in my life and I felt I'd experienced that to its fullest really and we'd done pretty well."
Current 'Celebrity Masterchef' winner Ade - who has has partnered with Merrydown cider to cook up three brand new recipes made from the alcoholic drink (Facebook.com/merrydown.cider) - also ruled out a Monty Python-style reunion show with Rik, 56, because most of their jokes were based around slapstick and physical comedy.
He said: "It would be quite hard to do a greatest hits tour with our show because it was always just the two of us swearing at each other and hitting each other."
When asked if a 'Young Ones' reunion stage show could happen with him, Rik, Nigel Planner and Christopher Ryan, he quipped: "That would be appalling, wouldn't it? Just imagine how bad that would be. You could come but it would be a shit show."

Charlize Theron is in talks for Sean Penn's 'The Last Space'.
The 38-year-old actress is expected to join 'Blue Is the Warmest Color' star Adele Exarchapoulos in the feature about the refugee camps in Sudan which is being helmed by Penn.
According to The Wrap, several weeks ago the blonde beauty's representative said her participation was "premature" and since then there have been no comments on her role in the forthcoming film which is in the early stages of production.
Meanwhile, Theron and Penn who are said to be moving in together are reportedly planning to adopt and the South African actress is eager for her son Jackson, two - who is also adopted - to have a brother or sister.
A source previously said: "Charlize was an only child and always wished for a brother or sister. It's important to her that Jackson have a brother or sister."
Penn - who has grown up daughter Dylan, 23, and son Hopper, 20, with his ex-wife Robin Wright - is said to be particularly keen to adopt from Haiti, the island where he has done much charity work since it was hit by an earthquake in 2010.

Cate Blanchett is in talks to star in 'The Dig'.
The Oscar-winning actress is negotiating a deal to play amateur archaeologist Edith Pretty in the story of 1938-9 excavation of Sutton Hoo in England, reports screendaily.com.
Blanchett's alter-ego leads a team who are evacuating the site which contains sixth and seventh century artifacts during the onset of World War Two.
'Serena' filmmaker Susanne Bier is attached to direct while Tamara Drewe and 'Byzantium' writer Moira Buffini will pen the script for the drama which is adapted from John Preston's novel of the same name.
The script is "a layered piece with great emotional weight in the tradition of films like 'The Remains of the Day', spanning love, life and death."
Murray Ferguson of Clerkenwell Films, Ellie Wood, and Philomena's Gaby Tana are producing while BBC Films' Christine Langan is executive producing.
Blanchett recently hit the big screen in George Clooney's 'The Monuments Men', alongside Matt Damon, Bill Murray and John Goodman.
She is also set to have performances in 'How to Train Your Dragon 2' and 'The Hobbit: There and Back Again', which are both out later this year.

The Ultimate Warrior spoke about death and his own legacy the day before he tragically passed away.
The late WWE legend said his "spirit" would "run on forever" as he made an impassioned speech during his appearance on TV show 'RAW' on Monday night (07.04.14) just hours before he died aged 54 on Tuesday (08.04.14).
Addressing an arena full of fans in New Orleans, Ultimate Warrior - real name James Hellwig - said: "No WWE talent becomes a legend on their own. Every man's heart one day beats its final beat. His lungs breathe a final breath and if what that man did in his life makes the blood pulse through the body of others and makes them bleed deeper and something larger than life then his essence, his spirit, will be immortalised.
"In the back I see many potential legends. Some with warrior spirits and you will do the same for them. You will decide if they lived with the passion and the intensity. So much so that you will tell your stories and you will make them legends as well. You are the Ultimate Warrior fans and the spirit of Ultimate Warrior will run forever."
Ultimate Warrior made his return to WWE television after an 18-year absence over the weekend when he was inducted into the Hall of Fame on Saturday night (05.04.14) and he then appeared at 'WrestleMania XXX' on Sunday evening (06.04.14) at the Superdome in New Orleans.
The cause of death has not yet been revealed but WWE (World Wrestling Entertainment) announced the news on its official website saying they were "shocked and deeply saddened" by his sudden passing.
Since then, numerous WWE stars both past and present have sent their tributes to the Ultimate Warrior via Twitter.
Triple H posted: "Saddened to announce the passing of the Ultimate Warrior. Icon and friend. My sympathy to his wife Dana and his daughters."
WWE World Heavyweight Champion Daniel Bryan tweeted: "Heartbroken. My sincerest condolences go out to The Warrior's family. Seeing how much he loved his daughters and his wife this weekend ... makes it all the more heartbreaking. The Ultimate Warrior was my favorite as a kid, and getting to speak to him this weekend was one ... of my favorite moments. He was so nice to me. #RIPWarrior (sic)"
Kevin Nash posted: "So happy I embraced Warrior with a hug when we saw each other backstage Saturday night. My heart goes out to his family. Always Believe."

Scarlett Johansson says getting on stage reinvigorated her love of acting.
The 'Captain America: The Winter Soldier' actress - who is expecting her first child with fiancé Romain Dauriac - felt "uninspired" by her work and lost her sense of "purpose" until she took on a role in the 2009 Broadway revival of 'A View from the Bridge'.
She admitted: "I was uninspired by my job for a period of time. I didn't really understand what the purpose of it was, other than to stay relevant, which is so not what it's about. But doing the play, I realised I could still own my own performance, that it was mine to present however I wanted to."
The 29-year-old beauty says she has always been competitive, and was so determined to land a role as Black Widow in the 'Avengers' series, she dyed her hair red ahead of a second meeting with director Jon Favreau.
She told the new edition of Vanity Fair magazine: "If you want something, you have to go for it.
"That's something I learned early on. I was really competitive at a young age."
And Scarlett also admitted she has no interest in social media.
She said: "All of it drives me crazy."

A post mortem examination into the death of Peaches Geldof has proved to be "inconclusive."
The 25-year-old TV personality was found dead at her home in Kent, South East England on Monday (07.04.14) and a post mortem was carried out today (09.04.14) at Darent Valley hospital in Dartford, Kent, by Dr Peter Graham Jerreat.
According to MailOnline, the family of the mother-of-two, the daughter of Bob Geldof and the late Paula Yates, will now have to wait for a toxicology report - including test results for drink and drugs - which could take up to several weeks.
Police have so far described her death as non-suspicious but "sudden and unexplained" and there were no drugs or suicide note found at the house.
Kent County Council said: "A decision on whether there needs to be an inquest depends upon the final results of the post mortem."
It has been reported that the alarm was raised by a "concerned relative" who called the emergency services at about 1.35pm.
Meanwhile, Peaches, who is survived by her husband Thomas Cohen and their sons Astala, 23 months, and Phaedra, 11 months, claimed she was "happier than ever" in her last magazine column.
The late star gushed about the joys of being a young mother in the pages of Mother & Baby magazine just weeks before her untimely death.
She wrote: "Other than work there was nothing stopping me from having constant fun. But it was becoming boring, I wanted an anchor. I craved it."

Samantha Harris is to undergo a double mastectomy after being diagnosed with breast cancer.
The former 'Dancing with the Stars' co-host has revealed that having contracting the disease, she's decided to go under the knife next month to have her breasts removed to cure her of the illness.
Speaking to People magazine she said: "I was sick of feeling the way that I did in the days after the diagnosis. I knew I needed to take control."
The 40-year-old television personality first suspected there was something wrong when she felt a lump during a routine self-examination last year, and although nothing was detected during a prior mammogram she was still worried and decided to see a specialist.
A needle biopsy followed by a lumpectomy found that she had breast cancer, and she's admitted that at first she had no idea how she was going to cope.
She said: "I felt like an elephant was sitting on my chest."
However, after visiting three different specialists and being advised that her options were either to undergo a double mastectomy or a less-radical second lumpectomy with radiation treatment, she made her decision.
Samantha - who has daughters Josselyn, 6, and Hilary, 3, with her husband Michael Hess - admitted she then "felt so much calmer" after taking control of her treatment programme.

Emma Stone looked smart in a grey fitted suit as she left the Radio 1 studios in London. Following the actress was her 'The Amazing Spiderman' co-star boyfriend, Andrew Garfield.

Anne Hathaway looked glum as she waited to appear on 'Good Morning America' in a long sleeved navy dress with her cropped hair clipped back.

Mollie King's glossy blonde hair matched her shiny satin trousers as she attended a film screening at the Curzon cinema in London's Mayfair. The Saturdays singer finished off her outfit with a brown clutch bag and bangles.

Kelly Brook was beaming as she opted for an all-natural look while strolling through Los Angeles, California in a plain blue t-shirt and dark jeans.