LOS ANGELES » Dwayne Johnson had an emergency operation for three hernial tears he suffered while wrestling John Cena during WrestleMania earlier this month.

The actor-wrestler, better known as “The Rock,” underwent surgery Monday, which is why he missed the Los Angeles premiere for his latest flick, “Pain & Gain,” E! News reported. The movie costars Mark Wahlberg and opens Friday.

But the 40-year-old is doing fine now, saying that the surgery was successful.

“Surgery a success! Dr repaired 3 hernial tears (fun pain). Superman is on the mend.. #WeFallWeRise,” Johnson tweeted Tuesday with a photo of himself in a hospital bed, flexing in a Superman T-shirt.

His publicist Alan Nierob told the Associated Press that he is now recovering at home.

Johnson, 40, wrestled with Cena on April 7 at Wrestlemania 29 to defend his championship title, but he lost the match — and his midsection suffered an even greater loss.

“In the middle of last night’s Wrestlemania match I tore my abdomen & abductor muscles off the bone. Just part of the job,” he wrote April 8, adding, “But as we know… It’s all about #JustBringIt. WWE Universe, THANK YOU for all the love & well wishes. Means everything to me. #LeaveItAllInTheRing.”

On Sunday, Johnson announced that he’d be having the surgery this week and tweeted that his doctor had to “push my intestines back thru the tear in my abdomen. Kinda romantic.”

The actor plays a workout-obsessed body builder in the upcoming film, and “Pain & Gain” director Michael Bay gave his apologies for the Rock’s absence on the red carpet Monday.

“Dwayne’s hurt tonight,” Bay said “He was pushing it too hard. (He) needs to grow up and stop wrestling 300-pound men.”

It doesn’t seem as if Johnson is shying away from the hulk-like roles any time soon: He has already been cast in the titular role of Brett Ratner’s “Hercules: The Thracian Wars.”