Watch: Milo Ventimiglia and Mandy Moore rap 'The Fresh Prince Of Bel-Air' theme-song.

To promote their new TV show, 'This Is Us', Milo Ventimiglia and Mandy Moore have rapped 'The Fresh Prince Of Bel-Air' theme-song on-camera for Glamour magazine.

If this seems a bit random to you, Ventimiglia explained the connection between himself and The Fresh Prince to Glamour: "That was my first paying gig. Will Smith treated me like a member of the family, and I will never forget how inclusive he was of everybody on the crew [and] everybody that was guest cast. He knew everyone’s name, and that [taught me to] respect the entire process and get to know everybody."

Watch the rap below...