Charlie Sheen, Brooke Mueller Ready to Rumble in Court

Actor and ex-wife both turn up to emergency custody hearing to determine whether Mueller violated terms of their agreement by refusing to take drug test

The gang's all here—now we wait.

Charlie Sheen and Brooke Mueller both arrived (separately, obviously) to Los Angeles Superior Court this morning for an emergency custody hearing called by Sheen to determine whether or not their custody agreement was violated.

And believe it or not, this time, Charlie's not the one accused of wrongdoing.

Sheen called for the hearing yesterday and flew in last night from his tour in order to be in court this morning. Rather than his usual M.O. of press time at any costs, however, instead of entering through the courthouse's main, media-flogged doors (like Brooke), he snuck in unseen through an entrance in the parking garage.

"I'm feeling terrific, thank you," Mueller told the press as she fought her way inside.

Cameras are not allowed in today's closed-doors hearing, which is expected to be on the brief side.

At issue is whether or not Mueller violated the terms of their custody deal last week when she failed to submit to a drug test. Not submitting to a test is tantamount, in the court's eyes, to yielding a positive result.

As it stands, Brooke has primary physical custody of their twin boys, but the couple shares legal custody. Sheen is looking to switch that up, as he reportedly believes that Mueller has not remained sober. Some evidence is expected to be presented in court today (exhibit A: her pawn shop peddling?) though it's unclear if the judge will make a ruling from the bench. It's also unclear if Denise Richards will end up lending a helping (and stable) hand.

Meanwhile, it's just one of two court hearings on Sheen's docket today, as a motions hearing dealing with his $100 million breach-of-contract suit against Warner Bros. and Two and a Half Men producer Chuck Lorre is also taking place this morning (right now, in fact) in Santa Monica.

Sheen claims that he, along with the cast and crew, should be paid for the eight episodes of the show that got scrapped after his firing.

Contrary to the secrecy required at the custody hearing, the judge in the civil hearing allowed cameras into the courtroom, despite protests from Lorre's attorney Howard Weitzman.

"This is a public forum," Judge Allan Goodman said. "The Supreme Court and the California Supreme Court has been clear the media is a substitute for the public."

Sheen's argument today, as proferred by attorney Marty Singer, is that he's not bound by Warner Bros.' arbitration clause and while his former employers want to solve their differences through arbitration, he is seeking to do so through a public trial.

—Reporting by Whitney English and Claudia Rosenbaum