In an interview with BBC Radio 4, the actor said that certain stars retain A-list status despite underperforming at the box office, and used Aniston to illustrate his point.
"If you look and analyze the careers of many, many stars, you'll find that they're mostly sustained by the business," Everett said. "You'll find there's lots of women and lots of men in the business that the powers that be decide are right for their business, and they'll stand with them for quite a long time.
"OK, something will go wrong, like Jennifer Aniston will have one too many total flops, but she's still a member of that club," Everett continued. "And she will still manage to -- like a star forming in the universe, things will swirl around her and it will suddenly solidify into another vital tasteless rom-com, a little glitter next to the Crab Nebula."
Since Friends ended in 2004, Aniston has starred in such flops as Derailed, Rumor Has It..., Love Happens, The Bounty Hunter and this summer's The Switch. Her box-office hits were The Break-Up, Marley & Me and the ensemble flick He's Just Not That Into You.
"Colin Firth -- I don't think was at all good in Mamma Mia! I would have thought it was almost a career-icide," Everett said. "On the other hand, I think his [Oscar-nominated] performance in A Single Man was the best performance of his life."
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