Streep 'proud to be old'

Streep, who will turn 60 in June, told the Radio Times that studios have been stuck in a rut of making movies to appeal to men and younger women who are dating.

"I think with the success of a few big pictures like Mamma Mia! addressing an audience that, never mind being neglected, have been disdained in the boardrooms, there will be other films that target that audience," she said.

"Mamma Mia! is that rare thing you can enjoy with your mother or your child, and its aim is only to make you happy."

The adaptation of the West End show based on Abba songs was last year's biggest box office hit in the UK, pulling in more than £69 million.

Streep said her daughters had helped her to stop worrying about her appearance over the years.

"I wasted so many years thinking I wasn't pretty enough and why didn't I have Jessica Lange's body or someone else's legs? What a waste of time," she told the magazine.