Jaws dropped when famous exes Brad Pitt and Jennifer Aniston reunited at the Screen Actors Guild Awards.

And their interaction didn't end there. The friendly exes attended the same after-party at Sunset Tower in West Hollywood.

Page Six reports that Pitt, 56, was there with Once Upon a Time in Hollywood co-stars Leonardo DiCaprio and Al Pacino, while Aniston, 50, was seen chatting to Laura Dern, as well as Netflix executives Ted Sarandos and Scott Stuber at the Netflix-hosted party.

The Friends star, who won Best Actress in a Drama Series for her role in The Morning Show, had dinner with friends at the hotel's Tower Bar, one of her favourite haunts.

There, Aniston was seen dining Jason Bateman, Billy Crudup and her producing partner Kristin Hahn.

An onlooker told Page Six: "We thought Brad would come into dinner, but no such luck, everyone in the restaurant was looking out for him - we all kept turning around to see if he had arrived".

Aniston and Pitt, who remained friends after their marriage ended in 2005, looked flirty as they were photographed running into one another backstage at the SAGs.

Sources told News Corp Pitt and Aniston appeared at ease in each other's company as they smiled and laughed, with Pitt holding Aniston by the hand as she walked away.

Pitt was named Outstanding Actor in a Supporting Role for Once Upon a Time in Hollywood, while Aniston claimed an acting honour in the TV category for her performance in Apple TV's The Morning Show (aka the show titled Morning Wars in Australia).

"I gotta add this to my Tinder profile," Pitt joked, as he accepted his award onstage in front of his ex-wife.

"I want to thank my co-stars: Leo, Margot Robbie, Margot Robbie's feet," he joked, referencing director Quentin Tarantino's famous foot fetish.

Pitt continued: "Margaret Qualley. Margaret Qualley's feet. Dakota Fanning's feet. Seriously, Quentin Tarantino has separated more women from their shoes than the TSA."

"Let's be honest, this was a tough part: A guy who gets high, takes his shirt off and doesn't get on with his wife," Pitt said, in his SAG speech which could have easily doubled as a comedy routine.

"It was a big stretch," he added, as the camera panned to a beaming Aniston.

"Enjoy this evening because tomorrow, it's back to work," he said, kissing his award.

Later, footage emerged of Pitt standing in front of a TV watching Aniston's acceptance speech backstage at the SAGs, as former Friends star Aniston won Outstanding Performance by a Female Actor in a TV Series. Pitt was overheard saying "wow" aloud as Aniston won.

Aniston told ET that Pitt's support "meant everything". Speaking after the SAG Awards, a reporter from the entertainment channel asked Aniston: "You had a lot of people emotional while you were giving your speech, backstage here you had Brad Pitt watching that monitor, crying," she said.

"No!" Aniston replied.

The ET reporter added: "What does it feel to have his support and all your friends support?"

"God it means everything, we all grow up together, this whole room that's why their performances just moved me and excite me and allowed me to be here," Aniston said.

"It's fantastic we are part of a community together, now we get to go back to work. It's nice to have a night where you get to dressed up and celebrate each other."

Meantime, Joker star Joaquin Phoenix paid tribute to the late Heath Ledger in his speech for Outstanding Performance by a Male Actor in a Leading Role.

The role of the Joker was, of course, also portrayed by Ledger, who won a posthumous Oscar for his performance of the Batman villain in The Dark Knight Rises.

"I'm standing here on the shoulders of my favourite actor Heath Ledger," Phoenix said, as he dedicated his SAG Award to the Australian, who died of an accidental drug overdose in 2008.

AUSSIE STARS MISS OUT

Nicole Kidman and Margot Robbie have been snubbed at the Screen Actors Guild Awards, losing to Oscar favourite Laura Dern.

Australian stars Robbie and Kidman were up against each other for Outstanding Performance by a Female Actor in a Supporting Role for Bombshell, but lost to Marriage Story's Dern, who is now a sure-fire favourite to win an Oscar for her role as a tough talking divorce lawyer in Noah Baumbach's Netflix drama.

Three weeks away from the Oscars, the SAGs will be an early test for the chances of the Academy Awards frontrunners, among them Renée Zellweger, Joaquin Phoenix and Pitt, who delivered a hilarious speech referencing his ex-wives and Tinder when he won for Once Upon a Time in Hollywood.

Leonardo DiCaprio presented screen legend Robert DeNiro with the SAG Award for Lifetime Achiement, as DeNiro delivered a politically-charged speech.

The SAG awards were broadcast from the Shrine Auditorium in Los Angeles. Because actors make up the largest percentage of the Academy of Motion Picture Arts and Sciences, their picks are closely watched in the lead up to next month's Oscars.

But the last two years, the SAG "ensemble" winner has not gone on to win best picture: Black Panther last year and Three Billboards Outside Ebbing, Missouri in 2018.

Two of this year's top best-picture contenders at the Oscars Joker and 1917 weren't nominated for best ensemble.

SAG AWARD WINNERS AND NOMINEES

MOVIES

OUTSTANDING PERFORMANCE BY A MALE ACTOR IN A LEADING ROLE

Christian Bale, Ford v Ferrari

Leonardo DiCaprio, Once Upon a Time … in Hollywood

Adam Driver, Marriage Story

Taron Egerton, Rocketman

Joaquin Phoenix, Joker - WINNER

OUTSTANDING PERFORMANCE BY A FEMALE ACTOR IN A LEADING ROLE

Cynthia Erivo, Harriet

Scarlett Johansson, Marriage Story

Lupita Nyong'o, Us

Charlize Theron, Bombshell

Renée Zellweger, Judy - WINNER

OUTSTANDING PERFORMANCE BY A MALE ACTOR IN A SUPPORTING ROLE

Jamie Foxx, Just Mercy

Tom Hanks, A Beautiful Day in the Neighbourhood

Al Pacino, The Irishman

Joe Pesci, The Irishman

Brad Pitt, Once Upon a Time … in Hollywood - WINNER

OUTSTANDING PERFORMANCE BY A FEMALE ACTOR IN A SUPPORTING ROLE

Laura Dern, Marriage Story - WINNER

Scarlett Johansson, Jojo Rabbit

Nicole Kidman, Bombshell

Jennifer Lopez, Hustlers

Margot Robbie, Bombshell

OUTSTANDING PERFORMANCE BY A CAST IN A MOTION PICTURE

Bombshell

The Irishman

Jojo Rabbit

Once Upon a Time … in Hollywood

Parasite - WINNER

OUTSTANDING PERFORMANCE BY A MALE ACTOR IN A TELEVISION MOVIE OR LIMITED SERIES

Mahershala Ali, True Detective

Russell Crowe, The Loudest Voice

Jared Harris, Chernobyl

Jharrel Jerome, When They See Us

Sam Rockwell, Fosse/Verdon - WINNER

OUTSTANDING PERFORMANCE BY A FEMALE ACTOR IN A TELEVISION MOVIE OR LIMITED SERIES

Michelle Williams, Fosse/Verdon - WINNER

Patricia Arquette, The Act

Joey King, The Act

Emily Watson, Chernobyl

Toni Collette, Unbelievable

OUTSTANDING PERFORMANCE BY A MALE ACTOR IN A DRAMA SERIES

Sterling K. Brown, This Is Us

Steve Carell, The Morning Show

Billy Crudup, The Morning Show

Peter Dinklage, Game of Thrones - WINNER

David Harbour, Stranger Things

OUTSTANDING PERFORMANCE BY A FEMALE ACTOR IN A DRAMA SERIES

Jennifer Aniston, The Morning Show - WINNER

Helena Bonham Carter, The Crown

Olivia Colman, The Crown

Jodie Comer, Killing Eve

Elisabeth Moss, The Handmaid's Tale

OUTSTANDING PERFORMANCE BY A MALE ACTOR IN A COMEDY SERIES

Alan Arkin, The Kominsky Method

Michael Douglas, The Kominsky Method

Bill Hader, Barry

Andrew Scott, Fleabag

Tony Shalhoub, The Marvelous Mrs. Maisel - WINNER

OUTSTANDING PERFORMANCE BY A FEMALE ACTOR IN A COMEDY SERIES

Christina Applegate, Dead to Me

Alex Borstein, The Marvelous Mrs. Maisel

Rachel Brosnahan, The Marvelous Mrs. Maisel

Catherine O'Hara, Schitt's Creek

Phoebe Waller-Bridge, Fleabag - WINNER

ACTION PERFORMANCE BY A STUNT ENSEMBLE IN A MOTION PICTURE

Avengers: Endgame - WINNER

Ford v Ferrari

The Irishman

Joker

Once Upon a Time … in Hollywood

ACTION PERFORMANCE BY A STUNT ENSEMBLE IN A COMEDY OR DRAMA SERIES

Game of Thrones - WINNER

GLOW

Stranger Things

The Walking Dead

Watchmen