Walt Disney Pictures/Pixar Animation Studios

Pixar is hoping to recapture the Finding Nemo magic with Finding Dory – the sequel to that Oscar-winning 2003 film, with Ellen DeGeneres reprising her voice role as Dory, the forgetful blue tang. Now the studio, via Entertainment Weekly, has detailed two supporting characters: snub-nosed beluga whale Bailey (voiced by Modern Family's Ty Burrell) and whale shark Destiny (voiced by It's Always Sunny in Philadelphia's Kaitlin Olson).

Finding Dory finds the title fish searching for her long-lost parents, encountering her new friends along the way at a marine life facility's rehabilitation center. The new characters reportedly have trouble getting along, though they still assist Dory in her reunion. "We totally get on each other’s nerves,” Olson says. "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."

"My character isn’t great at his own sonar capability, and Destiny has trouble swimming straight,” Burrell adds.

We know what you're thinking: It's a little weird that foul-mouthed Sweet Dee from It's Always Sunny is venturing into a kids movie. But Olson assures Nemo fans that Destiny will be a family-friendly change of pace. "I'm a lot nicer in this movie than I am in my television show,” she says. "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."

Finding Dory hits theaters June 17, 2016. It also features Albert Brooks, Diane Keaton, Willem Dafoe, Dominic West, Ed O'Neill, Eugene Levy and Idris Elba among its all-star cast.