After only two days of filming, newlyweds Spencer Pratt and Heidi Montag are already trying to jump ship on the NBC reality series I’m A Celebrity… Get Me Out Of Here.

According to a production source close to summer show, the stars of MTV’s The Hills tried to quit the show twice in the first 48 hours of shooting.

The seires, a spinoff of the British television reality hit of the same name, sees formerly high-profile celebs dumped in the Costa Rican jungle for the shot at a cash price. Former supermdel Janice Dickinson, former NBA star John Salley, American Idol alum Sanjaya Malakar, actor Stephen Baldwin will also appear on this season’s show, premiering tonight @ 8 PM.

“They walked out of the jungle yesterday and took their mics off and quit,” the source told Access Hollywood late Sunday. “[They] then decided to go back into the jungle last night and they made it through the night.”

“This morning, during the second day of shooting, they yet again walked back over the bridge to exit the jungle and head home,” the source continued.

Heidi and Spencer later returned to the set and have agreed to continue in the competition.

“They have since returned to the jungle and are committed to competing for their respective charities,” says the tipster. “We’re only on the second day of shooting, so we hope this time they will really stay.”