If the world doesn't end tomorrow, you can catch Justin Timberlake hosting Saturday Night Live with musical guest Lady Gaga at his side.

Gaga posted a picture of her and Timberlake on her Facebook wall and wrote, 'Don't be jealous ladies ;). I laughed so hard today I cried.'

Justin is no stranger to the SNL set. He has hosted the show several times before. His most recent was in May of 2009.

Recently, Justin has been taking time off from music to focus on his acting career. The Social Network actor will star with Mila Kunis in this summer's, Friends With Benefits.

Watch the promo below:

See Justin perform 'Single Ladies' with Beyonce back in 2008 on SNL.

Watch Justin's SNL 'D**k in a Box' video: