The 39-year-old actor took to Instagram on Thursday to gush over meeting Julia Roberts when they were both on The Late Late Show With James Corden. The Aquaman star brought his mom, Coni, along to the show's taping and the pair admittedly "geeked out" as they posed for adorable pics with the 51-year-old actress.
"Took me MA to see @j_corden. Meet the legend @juliaroberts the momoaz geeked out a lil. Aloha j," Momoa captioned a series of three snaps with Roberts.
While Momoa's fan moment over Roberts was kept backstage, his Aquaman co-star, Yahya Abdul-Mateen II, couldn't keep his excitement at bay during the interview.
"You were my first human crush," Abdul-Mateen, 32, confessed to the Hook actress, while Momoa hilariously sat between the two of them on the couch. "I was 5 years old and you were Tinkerbell. You were my Tinkerbell."
The sweet reveal was met with laughs and awes from the crowd, but Roberts just had one question. "I'm just a little bit stuck on the 'human crush,'" Roberts quipped.
Abdul-Mateen explained his statement with two words: "Jessica Rabbit."
As for Momoa's first crush, he didn't even pause one second before saying, "I married her," in reference to his wife, Lisa Bonet.
Momoa and Bonet share two kids, Lola, 11, and Nakoa-Wolf, 9. When ET's Nischelle Turner caught up with the actor at the Aquaman premiere earlier this week, he confessed that he was "nervous" to have his children see the flick.
"I'm a little nervous," he confessed. "But I'm very excited."
Jason Momoa out and about
Jason Momoa out and about
Jason Momoa, a cast member in "Justice League," arrives with his wife, actress Lisa Bonet, at the premiere of the film at the Dolby Theatre on Monday, Nov. 13, 2017, in Los Angeles. (Photo by Chris Pizzello/Invision/AP)
LOS ANGELES, CA - DECEMBER 12: Jason Momoa is seen arriving at the premiere of Warner Bros. Pictures' 'Aquaman' at the Chinese Theatre on December 12, 2018 in Los Angeles, California. (Photo by BG017/Bauer-Griffin/GC Images)
NEW YORK, NEW YORK - APRIL 03: Lisa Bonet and Jason Momoa attend the 'Game Of Thrones' Season 8 Premiere on April 03, 2019 in New York City. (Photo by Jamie McCarthy/WireImage,)
HOLLYWOOD, CA - DECEMBER 12: Actor Jason Momoa and wife/actress Lisa Bonet arrive for the Premiere Of Warner Bros. Pictures' 'Aquaman' held at TCL Chinese Theatre on December 12, 2018 in Hollywood, California. (Photo by Albert L. Ortega/Getty Images)
Jason Momoa during the filming of the Graham Norton Show at BBC Studioworks 6 Television Centre, Wood Lane, London, to be aired on BBC One on Friday evening. (Photo by Matt Crossick/PA Images via Getty Images)
Photo by: John Nacion/STAR MAX/IPx 2018 12/3/18 Jason Momoa is seen at BUILD Series in New York City.
NEW YORK, NY - December 03: Jason Momoa seen at Good Morning America promoting his new movie Aquaman on December 03, 2018 in New York City. Credit: RW/MediaPunch /IPX
Photo by: KGC-138/STAR MAX/IPx 2018 11/26/18 Jason Momoa at the premiere of "Aquaman" in London, England.
Photo by: zz/GOTPAP/STAR MAX/IPx 2018 7/21/18 Jason Momoa is seen signing autographs for fans at Comic-Con International 2018 in San Diego, CA.
Jason Momoa, a cast member in the upcoming films "Justice League" and "Aquaman," addresses the audience during the Warner Bros. Pictures presentation at CinemaCon 2017 at Caesars Palace on Wednesday, March 29, 2017, in Las Vegas. (Photo by Chris Pizzello/Invision/AP)
Jason Momoa attends “The Bad Batch” premiere on day 6 of the Toronto International Film Festival at the Ryerson Theatre on Tuesday, Sept. 13, 2016, in Toronto. (Photo by Jesse Herzog/Invision/AP)
Actor Jason Momoa poses for photographers upon arrival at the European Premiere of Suicide Squad, at a central London cinema in Leicester Square, Wednesday, Aug 3, 2016. (AP Photo/Joel Ryan)
Jason Momoa arrives at the premiere screening of SundanceTV's "The Red Road", on Monday, Feb. 24, 2014 in Los Angeles. (Photo by John Shearer/Invision for SundanceTV/AP Images)
Cast member Emilia Clarke, right, and Jason Momoa pose together at the premiere for the third season of the HBO television series "Game of Thrones" at the TCL Chinese Theatre on Monday, March 18, 2013 in Los Angeles. (Photo by Matt Sayles /Invision/AP)
Actor Jason Momoa attends the "Bullet To The Head" premiere at AMC Lincoln Square on Tuesday, Jan. 29, 2013 in New York. (Photo by Evan Agostini/Invision/AP)
Jason Momoa and Lisa Bonet attend the Cinema Society premiere of "The Skin I Live In" on Thursday, Oct. 13, 2011 in New York. (AP Photo/Peter Kramer)