Tony Raines — an MTV reality TV star — was arrested early Sunday morning for operating a vehicle while intoxicated … TMZ has learned.

Raines — a contestant on “The Challenge” and “Real World: Skeletons” — was arrested on 1 count of operating a vehicle while intoxicated, 1 count of reckless operation and four counts of negligent injuring.

It’s unclear exactly what led to his arrest … but, sources tell us Raines was at a  wedding in Hammond, Louisiana on Saturday night and he went to the afterparty at a nearby restaurant after.

Kieran Culkin gave the first thank you speech of the SAG Awards … or, at least he meant to — but, he just couldn’t get over how heavy the trophy was.

The actor accepted the trophy for Male Actor in Supporting Role in a Motion Picture … and, while it seems he may have meant to give an actual speech, when he grabbed the trophy that went out the window.

Check out the clip … Culkin receives the trophy and begins talking about it’s weight — and, he just can’t stop.

The bit goes on and on … before Culkin finally says he needs to actually say something and thank some people — including his pal and “A Real Pain” director Jesse Eisenberg.

He rattles off a series of names in about 30 seconds before walking off … unclear if he got everyone — but, it’s a nice recovery after clearly being distracted up to that point.

BTW, “Shogun” star Anna Sawai agreed with Culkin — admitting it is heavy at the end of her own speech for winning the Female Actor in Supporting Role in a Drama Series award.

It’s just the latest award Culkin’s won for his part in the drama movie about generational trauma set in Poland. He’s already won a BAFTA, Golden Globe and Critics Choice Award for the part, and he’s up for an Oscar next week too.

The most star-studded union in the world showed their style solidarity Sunday … with card carrying SAG members lookin’ real fashionable at this year’s Screen Actors Guild Awards!

Kristen Bell didn’t look nervous to host the show whatsoever on the red carpet … sharing a small smile in her layered multicolored mesh ensemble. Selena Gomez pulled off a more monochromatic look — stunning in navy blue dress. Meanwhile, Ariana Grande channeled Glinda in a frilly pink gown.

TV star Kerry Washington channeled the silver screen in her silver dress … taking the ‘little fires everywhere’ and bringing the heat to the red carpet.

Danielle Deadwyler caught a lot of eyes on the red carpet … with her multitiered dress giving her some volume at the show..

She’s up for a major award tonight … facing off with some established Hollywood heavyweights for the Film Supporting Actress award. She’s nominated for her part in “The Piano Lesson.”

And, Elle Fanning proved classic black will always be the new black … showing off her slender frame in the haute couture ensemble.

Among the other stars in attendance … Jason Segel, Kaitlyn Dever, Kathy Bates, Jamie Lee Curtis, Ethan Slater, Jessica Williams, Molly Shannon, Bowen Yang, Eleanor Matsuura, Carl Clemons-Hopkins, John Lithgow, Liza Colon-Zayas, Jeff Goldblum and SAG President Fran Drescher are just a few of the bold-faced names in attendance tonight.