The star of Good Luck Charlie isn’t even 2 years old yet and she’s got plenty of fans. Her biggest admirers are her co-stars on the new Disney family sitcom, which airs its latest new episode this Saturday.

Good Luck Charlie tells the story of the Duncan family adjusting to a new arrival baby Charlotte, who is also known as Charlie. Played by Mia Talerico, Charlie is left in the care of her three older siblings when both parents decide to go back to work.

Mom Amy Duncan is a nurse and dad Bob Duncan is an exterminator who drives a truck with a giant bug sculpture on top. Bridgit Mendler plays the role of the big sister Teddy, who is making a video diary for Charlie. Kids may remember Mendler as Juliet from Disney’s hit series Wizards of Waverly Place.

Going ga ga for the baby

On a recent visit to the set of this funny new show, the kids had much praise for their diaper-wearing co-star. Mendler, who is as sweet in person as she is on TV, expressed how much fun it is to have a baby co-star.

“We did not expect Mia to be such a well-behaved baby,” she said. “She’s been just incredible. She’s really social with everybody. She wants to have a good time and play with all of us.”

According to the cast, Mia is a very capable actress.

“She just has this really innate talent,” said Jason Dolley, who plays P.J., the oldest sibling. Dolley was last seen as Newt on Corey in the House. “She’s a great television baby; an amazing, adorable, cute baby.”

Bradley Steven Perry, who plays brother Gabe, a 5th grader, is surprised by her acting skills.

“We all say she reads the script,” Perry said. “She does stuff that’s in the script that you don’t think she’ll do.”

The cast of kids say they enjoy the time they get to spend with each other both on and off the show.

“I think I’ve been really lucky to have such a great group of people on the show,” Mendler said. “We all have bonded and we feel like a family. That makes work that much more fun.”

The group tends to hang out with each other off the set, too. Says Dolley, some of their favorite activities together include bowling and go-kart racing.

“We’ve really sort of become our own family on the set,” Dolley said. He also made a prediction. “I think people will tune into this and I think families will all really enjoy watching this. I think adults will laugh, kids will laugh. There’s something in it for everyone.”

In the upcoming episode “Charlie Did It!,” Unbeknownst to Teddy (Mendler) and Gabe (Bradley Steven Perry), sweet little baby Charlie (Telerico) grabs a pair of drugstore sunglasses and sets off alarms as they try to exit. When the overzealous store manager detains them, their afternoon turns into an in-store adventure for Gabe while Teddy befriends the assistant manager, Alice, who coincidentally is the most unpopular girl in their school.

Meanwhile, PJ (Jason Dolley) and Emmett (Micah Williams) come up with a jingle for Bob’s (Eric Allan Kramer) new commercial but find that they are all not in agreement.

“Charlie Did It!” premieres Sunday, May 9 @ 8:30PM ET/PT on Disney Channel.