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When a bunch of Hollywood's biggest stars get in a room together, you can expect a good time, and the Screen Actors Guild Awards did not disappoint.

"American Hustle" took home the night's top honor for outstanding performance by a cast in a motion picture, beating out "12 Years a Slave." Both films are leading Oscar nominees and each took home a Golden Globe last week for best comedy and best drama respectively.

See Complete List of Oscar Nominees

Lupita Nyong'o and Jared Leto led off the awards, winning prizes for supporting female actor and supporting male actor, respectively. Other winners Saturday night were Matthew McConaughey and Cate Blanchett for outstanding performance by a lead male and female actor.

But it was the speeches and the spontaneous interactions between the stars that made for the best moments of the night. Here are five of the best moments at the Screen Actors Guild Awards, plus one more you might have missed:

5 Best Moments from Golden Globes

1. Bradley Cooper Brought Suki Waterhouse

They've been dating for nearly a year, but Bradley Cooper and girlfriend Suki Waterhouse made their first appearance as a couple at an awards show Saturday. The pair spent the evening getting cozy, at times with Waterhouse cuddled up on Cooper's lap. Is the Oscars next or will Cooper bring his mother again?

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2. Michael Douglas Gives Shout Out to Dad

Michael Douglas picked up his third major award, following an Emmy and Golden Globe, for playing Liberace in the HBO film "Behind the Candelabra," and once again thanked his "partner in crime," Matt Damon. "I know we've gone head-to-head, but," he said cheekily as the crowd laughed and Damon mouthed "no" from the audience. "The truth is, and you know it, I am not here without Matt Damon." Douglas said Damon stuck by the part even when production had to be delayed a year while Douglas was treated for cancer.

Douglas ended his speech by thanking his father Kirk Douglas, "a 97-year-old member of SAG back at home who I know is particularly proud of me getting this award." He added, "But I want to thank all of you out here tonight for helping me get out of his shadow for a little bit."

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3. Lupita Nyong'o Recalls Working with Brad Pitt in Heartfelt Speech

In her win over Jennifer Lawrence, Nyong'o gave a lovely heartfelt speech in which she thanked "12 Years a Slave" author Solomon Northup "for a life well lived and a story hard to tell but a story told so well," and the film's director Steve McQueen "for taking a flashlight and shining it underneath the floorboards of this nation and reminding us what it is we stand on." She also served up this anecdote about the day she learned she'd be working with co-star and the film's producer Brad Pitt. "My dad was the first person I called when I got this role and I said to him, 'Daddy do you know Brad Pitt? I'm going to be in a movie with him. And he said, 'I don't know him personally, but I'm glad you got a job.' So am I, so am I!"

Pitt, who was sporting a closed-cropped look that he said was "for a part" and "not a choice," later gushed over the young actress at Sunday's Producers Guild Awards, where "12 Years" shared the top prize with "Gravity." "She's very special," Pitt told E! News. "Very special young lady. We're going to see great things from her."

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4. Rita Moreno Drops F-Bomb

At 82, Rita Moreno hasn't lost any of her spunk. The Emmy, Grammy, Oscar and Tony award winner danced to the stage to accept her Lifetime Achievement Award before dropping the F-bomb while expressing her excitement. "I'm so f***ing thrilled," she said. "I hope the man with the button was there on time." "Oh, I'm breathless I'm so bloody happy," Moreno said. "Late in the first act of my career, I was recognized with an Oscar. I was 31 and so astonished and surprised…I could only muster 'I couldn't believe it. I'll leave you with that.' And now this unexpected honor at 82, but hopefully it's early in the third act of my life." She ended her speech, singing Tony Bennett's "This Is All I Ask."

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5. Matthew McConaughey Spacy Speech

Matthew McConaughey's freewheeling speech at the Golden Globe Awards last week was nothing compared with the speech he gave at Saturday's SAG Awards, while accepting the best leading male actor trophy for "Dallas Buyers Club." McConaughey channeled several different topics, at one point touching on space while describing the feeling of bringing a character to life. "But boy when it does, and it feels like they could put a blindfold on you and put you on a spaceship and take you to Neptune and you could hop off on the planet and they better have the sprock control and you get off that spaceship because you are going to behave as your man. That is a glorious feeling!" he said.

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6. Plus One More!

If you turned off your TV just as final presenter Ben Affleck was bidding the audience good night, you may have missed the best moment of all. Cuba Gooding Jr., a member of the nominated cast of Lee Daniels' "The Butler," pulled a Kanye West and rushed the stage, surprising Affleck and delighting the Twittersphere.

"Happy MLK!" the Oscar winner said, referring to Martin Luther King Jr. Day today.

Gooding and Affleck then hugged it out.