Dwayne Johnson underwent emergency hernia surgery

Dwayne Johnson's rep tells E! News that the star underwent an emergency hernia operation last night, forcing him to miss last night's Los Angeles premiere of his latest film, Pain & Gain. He is now resting up at home.

The movie's director, Michael Bay, cited the recovery as the reason for his star's absence and suggested the injury stemmed from Johnson's other job wrestling for the WWE.

"Dwayne's hurt tonight," Bay told us on the red carpet. "He was pushing it too hard. [ He] needs to grow up and stop wrestling 300-pound men."

Get well, Rock!

The Rock is taking this "no pain, no gain" thing to heart.

Dwayne Johnson announced he's set to undergo surgery next week for an abdominal tear.

"Saw my Dr who had to push my intestines back thru the tear in my abdomen. Kinda romantic," the pro wrestler turned movie star tweeted on Sunday. "Surgery is next week. #BringItOn."

As it happened, Johnson was MIA for last night's Hollywood premiere of his new action flick, the Michael Bay-directed Pain & Gain costarring Mark Wahlberg.

A rep for the 40-year-old thesp was unavailable for comment.

But news of the operation comes after Johnson got back in the ring earlier this month to take on rival John Cena at Wrestlemania 29, a title match he subsequently lost.

Pain & Gain hits theaters this Friday.