Mueller is thankfully doing fine after being hospitalized Tuesday, Sheen's publicist, Stan Rosenfield, confirms to E! News.
"Brooke Mueller Sheen was taken to a Los Angeles area hospital Tuesday morning after experiencing premature contractions, which is not uncommon at this stage of a pregnancy carrying twins," Rosenfield said in a statement. "She is expected to be released from the hospital today."
Meanwhile, a spokeswoman for Planet Hollywood Resort & Casino in Las Vegas was quick to dispute an online report that Sheen was off partying in Sin City when his wife checked into the hospital.
"Absolutely not true," said casino rep Amy Sadowsky. "He was in Vegas for business...He did not spend the night, did not party."
Mueller, who swapped vows with Sheen last May, underwent emergency gall-bladder surgery in September, a routine procedure but one that carries extra risk for both mom and baby during the first trimester of pregnancy.