Pop superstar Justin Timberlake is set to take his relationship with actress Jessica Biel to the big screen.

The couple are currently looking for a movie project to work on together and are trying to agree on a suitable genre.

A source tells Irish newspaper the Sunday World, "Justin is very keen to do a comedy while Jessica wants to do something grittier because she's concerned about her image."

Timberlake took a break from making music in 2004 to kick-start his acting career and has since stared in a variety of movies including Alpha Dog, Southland Tales and as the voice of young King Arthur in last year's Shrek The Third.