British actor Dominic Cooper is calling for London's West End to undergo a major overhaul to make theatre more affordable and accessible to the general public.

The Mamma Mia! star, who has performed both in the West End and on Broadway, fears many fans are put off by high ticket prices and believes measures should be taken to make trips to the theatre a more pleasant experience.

He tells the London Evening Standard, "(The West End) needs to be made more accessible... You need to make it cheaper and more pleasant and an easier experience."

Cooper is convinced Sir Nicholas Hytner, the director of London's National Theatre, is the right person to take charge of an overhaul before the veteran theatre mogul retires in 2015.

He adds, "I don't know how to do that but I'm sure he knows."