'Riverdale' Stars KJ Apa & Camila Mendes Welcome Charles Melton to the Cast with Epic Pranks & a Pizza Party

The cast of 'Riverdale' welcomes the new kid in town

The teens of Riverdale know how to have a good time!

Over the weekend, Riverdale stars KJ Apa, Camila Mendes, and Charles Melton had what looks like one fun pizza party.

Mendes, who plays Veronica, shared the shot of herself holding pizza in a bikini-like position, flanked by a shirtless Apa and Melton.

But you better believe the boys are working for those six-packs. Melton recently shared this post-workout shot with Apa and fellow Riverdale newbie Mark Consuelos with the caption, "Beastmode."

RELATED: Mark Consuelos and His ‘Riverdale’ Co-Stars Go Into 'Beast Mode' at the Gym -- See the Pics!

Looks like the cast is already hard at work on season two of the hit series, and getting playful on set.

EXCLUSIVE: 'Riverdale' Romance Rundown -- All the Details on Season 2's Love Interests!

Melton is a series newcomer, replacing Ross Butler in the role of Reggie, Archie's bully who's always in competition with him. Maybe he was getting into character with the prank video he shared last week, which showed him luring Apa out of his trailer and nailing him with a water bottle in a sensitive area.

Apa also posted a prank video for fans, aply titled "Another grueling day at the office," showing Melton acting as drill seargent, and forcing him to do push ups.

Season two of Riverdale
is set to premiere on Oct. 11 at 8 p.m. ET/PT on The CW.