WWE Champion John Cena joins a fun-filled, special episode of True Jackson, VP Saturday, April 3, at 8:30 p.m. ET/PT on Nickelodeon. (PHOTOS | WATCH)

The episode airs as part of the network's "Up All Night" special theme night kicking off at 8 p.m. with an encore episode of iCarly, "iWant a World Record." True Jackson, VP's "Pajama Party" features guest stars Vivica A. Fox, Willow Smith, as well as a cameo appearance by Cena. 

In "Pajama Party," Amanda (Danielle Bisutti) crashes True's (Keke Palmer) slumber party, where their competitive sides turn a night of game-playing and secret-sharing into a battle of wills. Fox and Smith make special appearances, playing True's mother and young True, respectively. Meanwhile, Ryan (Matt Shively) and Jimmy's (Robbie Amell) preview screening of Cena's new action movie turns into an all-night adventure when their hero, Cena, surprises the audience by showing up, giving Ryan and Jimmy the thrill of their lives when he brings them to the set of his next movie, and later, to a celebrity hockey game.

For more on True Jackson, VP visit nick.com/shows/true-jackson-vp.