Author Bret Easton Ellis on Sunday slammed GLAAD for honoring President Bill Clinton.

Clinton received the group's inaugural Advocate for Change Award at Saturday's 24th Annual GLAAD Media Awards in Los Angeles.

(Related: Bill Clinton at gay awards: You will win the constitutional right to marry.)

In a series of tweets, Ellis said that GLAAD had “banned” him from the ceremony after learning that he planned to attend the event as a guest of an invitee.

“As a gay man in a domestic partnership who plans to get married I'm sad to hear I've been banned by GLAAD from attending tomorrow's event,” Ellis messaged. “GLAAD is supposedly 'furious' about my tweets. And I'm guessing not the ones concerning my boyfriend or how sexy I think Adam Driver is.”

Ellis is referring to tweets about actor Matthew Bomer, whom he said was not qualified to play the protagonist in a 50 Shades of Grey movie, and the show Glee, which he compared to stepping “into a puddle of HIV.”

“I don't care how good an actor you are but being married to another man complicates things for playing CG,” he wrote. “Okay I'll say it. Matt Bomer isn't right for Christian Grey because he is openly gay. He's great for other roles but is too big a game.”

GLAAD spokesman Rich Ferraro explained in a statement that they had sought a meeting with Ellis to discuss his tweets.

“GLAAD spoke with the guest who was planning to bring Bret about some of Bret's recent remarks, which the gay community responded negatively to,” Ferraro said in a statement given to The Hollywood Reporter. “We also asked for a time to sit down with Bret. They decided to replace Bret with a different guest and there has been no response to the offer of a meeting. We hope his tweets don't overshadow the high-profile allies and everyday LGBT people who will be onstage tonight advocating for equality in the Boy Scouts, marriage and across the country.”

Ellis responded with: “Bill Clinton signed DOMA and Don't Ask Don't Tell and cheated on Hillary. I dissed Glee and Matt Bomer as Christian Grey. GLAAD: RIGHT ON!”