Grey’s Anatomy star Isaiah Washington, aka Dr. Preston Burke, recorded a PSA for the Gay, Lesbian & Straight Education Network, which will premiere Thursday night on ABC.

This is in response to calling co-star T.R. Knight co-star a “faggot” last year and then repeating the word at the Golden Globes. “No, I did not call T.R. a faggot,” he told Access Hollywood at the Globes press room back in January. “Never happened, never happened.”

In the PSA, Isaiah says, “Words have power, the power to express love, happiness and joy. They also have the power to heal. When you use words to demean a person because of their sexual orientation, race or gender, you send a message of hate – a very powerful message. But we all have the power to demand better of one another, and ourselves. We have the power to heal and change the world with the words we use.”

Watch the video at People.

Here’s Part II (see part I) of the wedding scene on the set of Grey’s Anatomy held at the First Baptist Church in Hollywood on Monday.

Patrick Dempsey acted like his gentlemanly self, opening the car door up for co-star Ellen Pompeo. Isaiah Washington smokes some more on his cigar… And Diahann Carroll (Mama Jane/Burke’s mother) was also on set in her matronly wedding gown.

20+ pictures inside of the Grey’s Anatomy wedding scene…

Grey’s Anatomy stars Katherine Heigl, Ellen Pompeo, Patrick Dempsey, and Isaiah Washington take a break from filming their hit TV medical drama on Monday in Hollywood. (Patrick and Ellen were filming a wedding scene.)

Katherine took food back to her trailer, Ellen chatted with Patrick, and Isaiah smoked a cigar. Ellen’s always got a book or magazine with her on set!

Don’t miss the 2-hour Addison spin-off (Private Practice) episode on Thursday! Grey’s Anatomy episode “The Other Side of This Life” airs on Thursday, May 3 @ 9-11PM ET/PT on ABC.