After two movies in 2015, Pixar isn’t taking much time off. The Disney-owned studio’s next film is Finding Dory, the sequel to Finding Nemo. In addition to our favorite characters, Pixar has a new cast of fish to meet Dory and Nemo.

Entertainment Weekly revealed today that the film takes place just six months after the end of 2003’s Finding Nemo. The film centers on Dory’s (Ellen DeGeneres) quest to find her parents.

Ty Burrell (Modern Family) voices Bailey, a snub-nosed beluga whale Dory meets at a marine life facility’s rehabilitation center. Bailey’s friend is the whale shark Destiney, voiced by Kaitlin Olson (It’s Always Sunny In Philadelphia).

“My character isn’t great at his own sonar capability, and Destiny has trouble swimming straight,” Burrell told EW. Olson said that the two characters get on each other’s nerves, adding, “I like to think I’m a shark, but Bailey calls me a whale, and I make fun of his head, because it’s gigantic.”

Olson stressed that her character is definitely more kid-friendly than her role in It’s Always Sunny. “You don’t really see Sweet Dee being sweet, ever. This character is. It was a lot of fun to play that and be vulnerable,” she said.

Other new voices joining the Nemo team are Diane Keaton, Willem Dafoe, Dominic West, Ed O’Neill, Eugene Levy and Idris Elba. Albert Brooks is back to voice Nemo’s dad Marlin.

Finding Dory opens on June 17 and you can check out the first teaser here. It is being directed by Andrew Stanton, who helmed Nemo.