Guest Stars Jace Norman as Himself Robert Downey Jr. as Himself (Robert Downey, Jr.) Ariana Grande as Herself JoJo Siwa as Herself Dwayne Johnson as Himself Dove Cameron as Herself Chris Evans as Himself Camila Cabello as Herself Riele West Downs as Herself Kristen Bell as Herself Millie Bobby Brown as Herself Jules LeBlanc as Herself Ella Anderson as Herself Caleb McLaughlin as Himself Ellen DeGeneres as Herself Josh Gad as Himself BTS as Themselves Sean Ryan Fox as Himself Cooper Barnes as Himself Shawn Mendes as Himself Michael D. Cohen as Himself David Dobrik as Himself Finn Wolfhard as Himself Simon Cowell as Himself Sadie Sink as Herself Tom Kenny as Himself Noah Schnapp as Himself Bill Fagerbakke as Himself LeBron James as Himself Alia Shelesh as Herself Chris Hemsworth as Himself Jeremy Renner as Himself Mark Ruffalo as Himself Asher Angel as Himself (Performer) Scarlett Johansson as Herself Billie Eilish as Herself Lil Nas X as Himself Christina Koch as Herself