Wilmer Valderrama to play Melanie Griffith's toyboy lover

Actor Wilmer Valderrama is set to romance Hollywood veteran Melanie Griffith on the upcoming season of U.S. TV comedy Raising Hope.

The Working Girl star, 54, joined the cast of the show as Shannon Woodward's mum last month, and now TV bosses have brought in 32-year-old Valderrama to play her toyboy lover.

He will appear in at least three episodes of the forthcoming third series, which will begin in October.

Griffith's actress mum Tippi Hedren has also signed on to play her daughter's TV mum.