Credit: Greg Tidwell, Photo: Dwayne "The Rock" Johnson: A Stone-Cold Scrooge

UPDATE: The Rock's rep told E! News that he had to have an emergency hernia operation last night, forcing him to miss the Pain & Gain premiere. He is now resting at home.

Original story:

They say “no pain, no gain” — so Dwayne "The Rock" Johnson must be gaining a lot right now. The Rock, age 40, was injured earlier this month during a Wrestlemania fight. He'll head in for surgery next week, and E! News says he wasn't around for yesterday's Hollywood premiere of his new action movie Pain & Gain.

Here are some of The Rock's tweets about his injury. They're almost as painful to read as the actual injury.

Credit: @TheRock

April 8
"In the middle of last nights Wrestlemania match I tore my abdomen & adductor muscles off the bone. Just part of the job. But as we know....It's all about #JustBringIt. WWE Universe THANK YOU for all the love & well wishes. Means everything to me. #LeaveItAllInTheRing"

April 11
"My dr's said that starting back training w/ torn abdominals would be a bitch. Just found out they were right;). We gotta push thru.."

April 13
"Injury update: Dr's & I elected not to reattach tendons to my pelvis. They'll just scar up. Now I prep to shoot HERCULES #TheDemiGOD"

April 21
"Saw my Dr who had to push my intestines back thru the tear in my abdomen. Kinda romantic. Surgery is next week. #BringItOn"

And check out the photo he shared (at right) with a status update after the injury. Ouch. Good luck, man! You're a true fighter. If anyone can get through this with a smile...

Sources: @TheRock, E! News