Trundle will appear in the play "FunkFace!" from February13-15 at Swansea's Grand Theatre. He plays a footballer.
"It's his first stage performance and he is really looking forward to it," explained the show's executive producer Roger Lawrence.
"Footballers like to get involved in other things outside of football such as fashion and it's great Lee wants to do a bit of acting.
"It's set in the make-up department of a department store and Lee is there as a footballer who is part of a fashion show. He is very much playing himself."