This Friday, Nickelodeon series Blues Clues & You! celebrates Blue’s birthday with a special episode. The episode, titled “Happy Birthday Blue,” will unite new host Josh with former Blue’s Clues host Joe (Donovan Patton) to mark the special occasion. In the episode, Josh and home viewers will play a round of “Blue’s Clues” to figure out what present the puppy wants for her birthday. That’s where Joe — who now runs a gift shop (evident by his purple sweater in the photo above) — comes along to help the mystery-solving squad figure out what Blue wants.

In addition to the on-air birthday plans, several celebrity friends will make a special appearance to wish the puppy well. Stars Samantha Bee, Rachel Dratch, Laurie Hernandez, Alexa and Carlos PenaVega, Kal Penn, and Pete Wentz pop in to share heartfelt well-wishes.

The new episode premieres on Friday, Feb. 7, at 11 a.m.

For Blues Clues & You!, Just Play is the global preschool toy partner for plush, figures, playsets and role-play; VTech is the global partner for early learning toys; and Cardinal will handle games and puzzles.