Comedian Gallagher in 2003. (Marvin Joseph/The Washington Post)

After the death of three horses, HBO has canceled “Luck,” a critically liked but little-watched drama about horse racing. Although a second season had been ordered and was under production, it will no longer go forward. The series finale airs Sunday, March 25. (TV Column)

Who came to the White House for Wednesday’s British state dinner (which was technically not a state dinner but was called that anyway)? George Clooney , Damien Lewis of “Homeland,” two former “Wire” stars (Wendell Pierce and Idris Elba ) and — and! — Lord and Lady Grantham (Hugh Bonneville and Elizabeth McGovern). Read all about it, then look at all the photos.

An arrest warrant has been issued for comedian/actor Russell Brand, according to TMZ, for allegedly throwing a paparazzo’s iPhone through a law firm’s window. Brand responded to the allegation thusly on Twitter: “Since Steve Jobs died I cannot bear to see anyone use an iphone irreverently, what I did was a tribute to his memory.” (TMZ; @rustyrockets)

Celebritology chat : We’ll discuss current pop cultural events today at 2 p.m. ET. Join us, won’t you?

James Franco gets soapy again, after the jump.

James Franco will guest star of Nick at Nite’s primetime soap opera, “Hollywood Heights.” The actor had a previous guest spot on “General Hospital.” (Vulture)

Jeremy Sisto and his wife, Addie Lane, welcomed a son Friday. Baby boy Sisto has yet to be named. (People)

How dead-on was Julianne Moore’s Sarah Palin in “Game Change”? The Post’s Hank Stuever already described it as eerily perfect in his review of the HBO film. This video, which compares Palin moments from real life with those depicted in the movie, demonstrates just how eerie. (Via Buzzfeed)