Justin Timberlake was seduced by cartoon character Jessica Rabbit, played by his girlfriend Jessica Biel on Saturday Night Live this weekend.

Justin unleashed his inner geek to play husband, Irving, who is tempted away from his unattractive wife Cathy by a buxom-looking Jessica - in a sketch based on long-running U.S. comic strip, Cathy.

Viewers cheered as Justin made his cameo on the show.

He said to his 'wife': "If Jessica Rabbit walked in here now I wouldn't even blink."

As Jessica slinked on stage dressed as the alluring cartoon character, she purred: "You want to go on a walk?"

Justin replied: "Sounds good."

He then tells his 'wife': "See you later, fatty."

Jessica Rabbit - the seductive wife of Roger Rabbit in the animated fantasy flick Who Framed Roger Rabbit - was recently named the sexiest cartoon character by a UK chocolate manufacturer.