Insider reveals how Scarlett Johansson's fiancé, Colin Jost, and ex-husband Ryan Reynolds interacted at 'SNL'

There's no chilliness between Scarlett Johansson's current and former flames.

The actress' ex-husband, Ryan Reynolds, made a surprise appearance on "Saturday Night Live" as a guest on "Weekend Update" — which is co-hosted by her fiancé, Colin Jost.

Reynolds rolled up to the desk to join Alex Moffat in-character as two guys who are cocky, wealthy and totally impotent. "It's tight to be here, CoJo," Reynolds said, greeting Jost.

"My two best friends," Jost dryly joked of the two as the segment wrapped up.

RELATED: Colin Jost and Scarlett Johansson together

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Colin Jost and Scarlett Johansson together
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Colin Jost and Scarlett Johansson together
LOS ANGELES, CALIFORNIA - APRIL 22: Colin Jost and Scarlett Johansson attends the World Premiere of Walt Disney Studios Motion Pictures 'Avengers: Endgame' at Los Angeles Convention Center on April 22, 2019 in Los Angeles, California. (Photo by Jeff Kravitz/FilmMagic)
LOS ANGELES, CALIFORNIA - APRIL 22: Colin Jost and Scarlett Johansson attend the World Premiere Of Walt Disney Studios Motion Pictures 'Avengers: Endgame' at Los Angeles Convention Center on April 22, 2019 in Los Angeles, California. (Photo by Jon Kopaloff/Getty Images)
LOS ANGELES, CA - SEPTEMBER 17: Scarlett Johansson and Colin Jost attend the 70th Emmy Awards at Microsoft Theater on September 17, 2018 in Los Angeles, California. (Photo by Dan MacMedan/Getty Images)
LOS ANGELES, CA - SEPTEMBER 17: Scarlett Johansson and Colin Jost attend the 70th Emmy Awards - Arrivals at Microsoft Theater on September 17, 2018 in Los Angeles, California. (Photo by David Crotty/Patrick McMullan via Getty Images)
NEW YORK, NY - MAY 07: Actor Scarlett Johansson and comedian Colin Jost attend the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Noam Galai/Getty Images for New York Magazine)
NEW YORK, NY - MAY 07: Actor Scarlett Johansson and comedian Colin Jost attend the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Jason Kempin/Getty Images)
NEW YORK, NY - MAY 07: Scarlett Johansson and Colin Jost attend the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Theo Wargo/Getty Images for Huffington Post)
NEW YORK, NY - MAY 07: Colin Jost and Scarlett Johansson attends the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Frazer Harrison/FilmMagic)
NEW YORK, NY - MAY 07: Colin Jost and Scarlett Johansson attend the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by James Devaney/GC Images)
HOLLYWOOD, CA - APRIL 23: Actors Scarlett Johansson and Colin Jost attend the premiere of Disney and Marvel's 'Avengers: Infinity War' on April 23, 2018 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LOS ANGELES, CA - APRIL 23: Scarlett Johansson, Colin Jost arrives at the Premiere Of Disney And Marvel's 'Avengers: Infinity War' on April 23, 2018 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
LOS ANGELES, CA - APRIL 23: Scarlett Johansson, Colin Jost arrives at the Premiere Of Disney And Marvel's 'Avengers: Infinity War' on April 23, 2018 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
LOS ANGELES, CA - APRIL 23: Scarlett Johansson, Colin Jost arrives at the Premiere Of Disney And Marvel's 'Avengers: Infinity War' on April 23, 2018 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
NEW YORK, NY - NOVEMBER 30: Colin Jost and Scarlett Johansson attends The 2017 Museum Gala at American Museum of Natural History on November 30, 2017 in New York City. (Photo by Sylvain Gaboury/Patrick McMullan via Getty Images)
NEW YORK, NY - NOVEMBER 30: Colin Jost and Scarlett Johansson attends The 2017 Museum Gala at American Museum of Natural History on November 30, 2017 in New York City. (Photo by Sylvain Gaboury/Patrick McMullan via Getty Images)
NEW YORK, NY - NOVEMBER 15: Scarlett Johansson and Colin Jost attend American Museum Of Natural History's 2018 Museum Gala at American Museum of Natural History on November 15, 2018 in New York City. (Photo by Sylvain Gaboury/Patrick McMullan via Getty Images)
Actress Scarlett Johansson and boyfriend comedian Colin Jost attend the American Museum of Natural History's 2018 Museum Gala on November 15, 2018 in New York City. (Photo by Angela Weiss / AFP) (Photo credit should read ANGELA WEISS/AFP/Getty Images)
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Although some guys might blanch at the idea of palling around with a lover's past or current beau, an insider speaking to Page Six said there was no such hesitation: "It was cute. There was no problem between them at all on set."

Johansson herself will host "SNL" on Dec. 14, where she may or may not acknowledge her engagement to Jost, who is the show's co-head writer alongside Michael Che. The two became smitten in 2017; multiple onlookers reportedly saw them smooching at an "SNL" afterparty after she made an appearance on the show.

After two years together, the couple got engaged in May 2019.

Reynolds and Johansson were married from 2008 to 2011. He is now married to actress Blake Lively.

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Blake Lively and Ryan Reynolds together
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Blake Lively and Ryan Reynolds together
NEW YORK, NY - MAY 14: Actors Blake Lively (L) and Ryan Reynolds attend the 'Deadpool 2' screening at AMC Loews Lincoln Square on May 14, 2018 in New York City. (Photo by Michael Loccisano/Getty Images)
NEW YORK, NY - APRIL 02: Blake Lively and Ryan Reynolds attend New York Premiere of 'A Quiet Place' on April 2, 2018 in New York City. (Photo by Sylvain Gaboury/Patrick McMullan via Getty Images)
NEW YORK, NY - APRIL 02: Blake Lively, Tammy Reynolds and Ryan Reynolds attend New York Premiere of 'A Quiet Place' on April 2, 2018 in New York City. (Photo by Sylvain Gaboury/Patrick McMullan via Getty Images)
NEW YORK, NY - MARCH 22: Blake Lively and Ryan Reynolds depart the Guggenheim on March 22, 2018 in New York City. (Photo by Gotham/GC Images)
Blake Lively and Ryan Reynolds attend the 'Final Portrait' New York screening at Guggenheim Museum on March 22, 2018 in New York City. / AFP PHOTO / ANGELA WEISS (Photo credit should read ANGELA WEISS/AFP/Getty Images)
NEW YORK, NY - OCTOBER 16: Blake Lively and Ryan Reynolds leave The Whitby Hotel on October 16, 2017 in New York City. (Photo by James Devaney/GC Images)
NEW YORK, NY - MAY 01: Blake Lively and Ryan Reynolds attend the 'Rei Kawakubo/Comme des Garcons: Art Of The In-Between' Costume Institute Gala at the Metropolitan Museum of Art on May 1, 2017 in New York City. (Photo by Karwai Tang/WireImage)
NEW YORK, NY - MAY 01: Actors Ryan Reynolds (L) and Blake Lively attend the 'Rei Kawakubo/Comme des Garcons: Art Of The In-Between' Costume Institute Gala at Metropolitan Museum of Art on May 1, 2017 in New York City. (Photo by Michael Stewart/WireImage)
NEW YORK, NY - APRIL 25: Blake Lively and Ryan Reynolds attend the 2017 Time 100 Gala at Jazz at Lincoln Center on April 25, 2017 in New York City. (Photo by Taylor Hill/FilmMagic)
BEVERLY HILLS, CA - JANUARY 08: 74th ANNUAL GOLDEN GLOBE AWARDS -- Pictured: (l-r) Actor Ryan Reynolds and actress Blake Lively arrive to the 74th Annual Golden Globe Awards held at the Beverly Hilton Hotel on January 8, 2017. (Photo by Neilson Barnard/NBCUniversal/NBCU Photo Bank via Getty Images)
ANAHEIM, CA - DECEMBER 16: In this handout photo provided by Disney Parks, Ryan Reynolds and Blake Lively meet Mickey Mouse at Sleeping Beauty's Winter Castle at Disneyland park December 16, 2016 in Anaheim, California. (Photo by Richard Harbaugh/Disneyland Resort via Getty Images)
HOLLYWOOD, CA - DECEMBER 15: Actors Ryan Reynolds and Blake Lively with daughters James Reynolds and Ines Reynolds attend the ceremony honoring Ryan Reynolds with a Star on the Hollywood Walk of Fame on December 15, 2016 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
HOLLYWOOD, CA - DECEMBER 15: Actors Ryan Reynolds and Blake Lively attend the ceremony honoring Ryan Reynolds with a Star on the Hollywood Walk of Fame on December 15, 2016 in Hollywood, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
Actor Ryan Reynolds and Blake Lively arrive at a State Dinner in honor of Canadian Prime Minister Justin Trudeau at the White House in Washington on March 10, 2016. / AFP / CHRIS KLEPONIS (Photo credit should read CHRIS KLEPONIS/AFP/Getty Images)
NEW YORK, NY - FEBRUARY 10: Actors Blake Lively and Ryan Reynolds attend the 2016 amfAR New York Gala at Cipriani Wall Street on February 10, 2016 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
NEW YORK, NY - FEBRUARY 08: Ryan Reynolds and Blake Lively attend 'Deadpool' fan event at AMC Empire Theatre on February 8, 2016 in New York City. (Photo by Laura Cavanaugh/FilmMagic)
Blake Lively and Ryan Reynolds attend the '2016 amfAR' New York Gala - outside arrivals in New York City. �� LAN (Photo by Lars Niki/Corbis via Getty Images)
NEW YORK, NY - FEBRUARY 08: Ryan Reynolds and Blake Lively attend 'Deadpool' fan event at AMC Empire Theatre on February 8, 2016 in New York City. (Photo by Laura Cavanaugh/FilmMagic)

The only thing better than Blake's dress was her handsome husband, Ryan Reynolds, by her side. (Photo by Dimitrios Kambouris/Getty Images for Gabrielle's Angel Foundation)

NEW YORK, NY - MAY 05: Actors Ryan Reynolds (L) and Blake Lively attend the 'Charles James: Beyond Fashion' Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York City. (Photo by Mike Coppola/Getty Images)
NEW YORK, NY - FEBRUARY 12: Designer Gabriela Cadena and Blake Lively pose backstage before the Gabriela Cadena fashion show during Mercedes-Benz Fashion Week Fall 2015 at One World Trade Center on February 12, 2015 in New York City. (Photo by Wendell Teodoro/WireImage)
HOLLYWOOD, CA - JUNE 15: Actors Blake Lively (L) and Ryan Reynolds arrive at the 'Green Lantern' Los Angeles Premiere held at at Grauman's Chinese Theatre on June 15, 2011 in Hollywood, California. (Photo by Lester Cohen/WireImage)
NEW YORK, NY - FEBRUARY 12: Blake Lively poses backstage before the Gabriela Cadena fashion show during Mercedes-Benz Fashion Week Fall 2015 at One World Trade Center on February 12, 2015 in New York City. (Photo by Wendell Teodoro/WireImage)
NEW YORK, NY - FEBRUARY 12: Designer Gabriela Cadena (L) and Actress Blake Lively pose backstage at the Gabriela Cadena fashion show during Mercedes-Benz Fashion Week Fall 2015 on February 12, 2015 in New York City. (Photo by Stephen Lovekin/Getty Images for Gabriela Cadena)
NEW YORK, NY - DECEMBER 02: Blake Lively attends L'Oreal Paris' Ninth Annual Women of Worth Awards at The Pierre Hotel on December 2, 2014 in New York City. (Photo by D Dipasupil/FilmMagic)
NEW YORK, NY - DECEMBER 02: Actress Blake Lively attends L'Oreal Paris' Ninth Annual Women Of Worth Celebration at The Pierre Hotel on December 2, 2014 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - DECEMBER 04: Blake Lively is seen in New York City on December 04, 2014 in New York City. (Photo by Ignat/Bauer-Griffin/GC Images)
NEW YORK, NY - NOVEMBER 08: Blake Lively attends 2014 American Made Summit: In Conversation With Martha Stewart And Blake Lively at Martha Stewart Living Omnimedia Headquarters on November 8, 2014 in New York City. (Photo by Laura Cavanaugh/FilmMagic)
CANNES, FRANCE - MAY 16: Ryan Reynolds and Blake Lively attend 'The Captives' Premiere at the 67th Annual Cannes Film Festival>> on May 16, 2014 in Cannes, France. (Photo by Venturelli/WireImage)
NEW YORK, NY - NOVEMBER 08: Actress Blake Lively attends 2014 American Made Summit: In Conversation with Martha Stewart and Blake Lively at Martha Stewart Living Omnimedia Headquarters on November 8, 2014 in New York City. (Photo by Desiree Navarro/WireImage)
Hot mama! Lively put her new pregnancy curves on display in a butter colored Gucci’s Resort 2015 gown, which featured a plunging, embellished neckline for the 2014 Angel Ball in New York City on October 20. (Photo by J. Countess/Getty Images)

Never one to stray away from color, the former "Gossip Girl" star channeled her fashion-loving character Serena and draped her bump in a tribal print poncho as she ran errands in New York City. She polished off the look with a pair of knee-high boots. (Photo by Raymond Hall/GC Images)

Lively is all about the prints! The blond babe put her best foot forward in a printed jumpsuit as she hit the Big Apple in October. (Photo by NCP/Star Max/GC Images)

Lively's first red carpet appearance since she announced her pregnancy was certainly a hit. The Green Lantern" gal sparkled in a Michael Kors gown at the God's Love We Deliver Golden Heart Awards. (Photo by Gilbert Carrasquillo/FilmMagic)
What a wonderful night with @amberrosetamblyn and @travislouie at the opening of his new show in NYC. He is one of my favorite artists and a great father, husband and man! So grateful to know him 😊 Ps. Thank you Amber for playing dress up with me #PreserveStyle Who can iSpy the @preserve_us pieces we borrowed?

Blake Lively announced her pregnancy on her website, Preserve, on October 5, wearing this gorgeous printed orchid Sam & Lavi maternity look. The skirt and blouse combo was a serious hit and practically flew off the shelves.

NEW YORK, NY - OCTOBER 20: Actors Blake Lively and Ryan Reynolds attend 2014 Angel Ball at Cipriani Wall Street on October 20, 2014 in New York City. (Photo by Bennett Raglin/WireImage)
CANNES, FRANCE - MAY 16: Blake Lively and Ryan Reynolds attend the 'Captives' Premiere at the 67th Annual Cannes Film Festival on May 16, 2014 in Cannes, France. (Photo by Foc Kan/FilmMagic)
NEW YORK, NY - OCTOBER 20: Actress Blake Lively (L) and Ryan Reynolds attend Angel Ball 2014 hosted by Gabrielle's Angel Foundation at Cipriani Wall Street on October 20, 2014 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Gabrielle's Angel Foundation)
CANNES, FRANCE - MAY 16: Blake Lively and Ryan Reynolds attend the 'Captives' Premiere at the 67th Annual Cannes Film Festival on May 16, 2014 in Cannes, France. (Photo by Foc Kan/FilmMagic)
CANNES, FRANCE - MAY 16: Blake Lively and Ryan Reynolds attend 'The Captive' Premiere at the 67th Annual Cannes Film Festival on May 16, 2014 in Cannes, France. (Photo by Tony Barson/FilmMagic)
NEW YORK, NY - MAY 05: Blake Lively and Ryan Reynolds attend the 'Charles James: Beyond Fashion' Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York City. (Photo by Axelle/Bauer-Griffin/FilmMagic)
NEW YORK, NY - MAY 05: Blake Lively and Ryan Reynolds attend the 'Charles James: Beyond Fashion' Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York City. (Photo by Dimitrios Kambouris/Getty Images)
NEW YORK, NY - NOVEMBER 09: (EXCLUSIVE COVERAGE) (L-R) Ryan Reynolds, Blake Lively, Tracy Pollan and Michael J. Fox attend the 2013 A Funny Thing Happened On The Way To Cure Parkinson's event benefiting The Michael J. Fox Foundation for Parkinson's Research at The Waldorf=Astoria on November 9, 2013 in New York City. (Photo by Dimitrios Kambouris/MJF2013/WireImage)
(L-R) Actors Michael Clarke Duncan, Ryan Reynolds, Blake Lively, director Martin Campbell and President Warner Bros. Pictures Group Jeff Robinov arrive at the 'Green Lantern' Los Angeles Premiere held at at Grauman's Chinese Theatre on June 15, 2011 in Hollywood, California.
UNIVERSAL CITY, CA - JUNE 05: Actors Blake Lively (L) and Ryan Reynolds speak onstage during the 2011 MTV Movie Awards at Universal Studios' Gibson Amphitheatre on June 5, 2011 in Universal City, California. (Photo by Kevin Winter/Getty Images)
Actors Ryan Reynolds (L) and Blake Lively arrive at the 'Green Lantern' Los Angeles Premiere held at at Grauman's Chinese Theatre on June 15, 2011 in Hollywood, California.
Actors Ryan Reynolds and Blake Lively accepts award onstage during Spike TV's 'Scream 2010' at The Greek Theatre on October 16, 2010 in Los Angeles, California.
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