A morning mix of entertainment headlines...

Trawick and Spears. (Chris Pizzello/AP)

Jason Trawick officially became a co-conservator yesterday for the affairs of fiancee Britney Spears , People magazine reports. Spears’s father, Jamie Spears, was appointed the sole legal conservator over his daughter’s affairs following her 2008 breakdown. Now Trawick, also Spears’s manager, will share the responsibility, although Jamie Spears will continue to oversee the “Hold It Against Me” singer’s finances until a judge deems that she is healthy enough for the conservatorship to be lifted.

Bobby Brown has entered a no-contest plea to a charge of drunk driving. Brown’s attorney entered the plea yesterday in L.A., according to the Associated Press. Brown was sentenced to three years of probation and must take a 90-day alcohol education class. The ex-husband of Whitney Houston was arrested on the DUI charge last month after being pulled over for talking on a cellphone.

Did Lindsay Lohan show up late for one of her days of “Glee” shooting? Dot Marie Jones, who plays Coach Beiste, tweeted some frustration about people who “show up late and just throw a wrench in things.” TMZ claims to have confirmed the late person in question was Lohan, although Jones deleted the tweet and the recently off-probation actress has reportedly been otherwise professional during the “Glee” shoot.

In a moment that sounds like it came from an episode of “Seinfeld” because it was in an episode of “Seinfeld,” a dead whale was found off of Puget Sound yesterday with a golf ball in its stomach. Scientists said the golf ball — not to mention other random junk — in the whale’s system did not cause its death; Yahoo! also notes that the whale will be sent to D.C.’s Smithsonian Institution. Dan Hopper at Best Week Ever has a more plausible explanation for what happened here: “SOMMMMMEEEEBODDDYYYYY was wailing golf balls out into the ocean, and when the suffocating whale washed ashore, they couldn’t get a REAL marine biologist there in time.” One thing is clear: The sea was angry that day, my friends.

Rooney Mara may take over the role originally slated for Carey Mulligan in the next Spike Jonze/Charlie Kaufman collaboration. Hitfix notes that Mara is in talks to play an unspecified part in the film, about a man who falls in love with a computer voice akin to the iPhone’s Siri. So it’s sort of a modern twist on “Electric Dreams,” then?

The New York Daily News has some casting suggestions for “50 Shades of Grey.” They’re not into Ian Somerhalder as Christian Grey, but they do like Christian Bale or Zac Efron for the role, and think Zooey Deschanel or Emma Watson would make solid Ana Steeles. Not sure if I agree with all of these...

In case you doubted that “The Avengers” would be a box office success, it’s already making plenty of cash overseas. According to the Hollywood Reporter, it’s opened strong in Australia, New Zealand, France and Taiwan and already has $12.5 million in its superheroic pockets. Its Australia opening was the second highest of all time, while its debuts in New Zealand and Taiwan were also record-setters.

The Celebritology chat is on, today at 2 p.m. Eastern. Bring your questions.