Chris Evans caught staring at Elizabeth Olsen's breasts at 'Captain America' premiere

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              A-list cast of Captain America: Civil War attend European premiere in London

Caught in the act!

Chris Evans attended the "Captain America: Civil War" premiere in London and it seems like he had the best time out of everyone ...

The 34-year-old actor, who plays Captain America in the hit franchise, was spotted peeping at his co-star's breasts while posing for group pictures on the red carpet.

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Elizabeth Olsen
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Chris Evans caught staring at Elizabeth Olsen's breasts at 'Captain America' premiere
LONDON, ENGLAND - APRIL 26: Elizabeth Olsen attends the European premiere of 'Captain America: Civil War' at Vue Westfield on April 26, 2016 in London, England (Photo by Anthony Harvey/Getty Images)
LONDON, ENGLAND - APRIL 26: Elizabeth Olsen arrives for European film premiere 'Captain America: Civil War' at Vue Westfield on April 26, 2016 in London, England (Photo by Karwai Tang/WireImage)
LONDON, ENGLAND - APRIL 26: Elizabeth Olsen arrives for the European film premiere of 'Captain America: Civil War' at Vue Westfield on April 26, 2016 in London, England (Photo by Dave J Hogan/Dave J Hogan/Getty Images)
LONDON, ENGLAND - APRIL 25: Elizabeth Olsen attends a photocall for 'Captain America: Civil War' at Corinthia Hotel London on April 25, 2016 in London, England. (Photo by Dave J Hogan/Dave J Hogan/Getty Images)
LONDON, ENGLAND - APRIL 25: Elizabeth Olsen seen at BBC Radio One on April 25, 2016 in London, England. (Photo by Neil Mockford/Alex Huckle/GC Images)
LOS ANGELES, CA - MARCH 21: Actress Elizabeth Olsen is seen at 'Jimmy Kimmel Live!' on March 21, 2016 in Los Angeles, California. (Photo by JMA/Star Max/GC Images)
MILAN, ITALY - FEBRUARY 24: Elizabeth Olsen arrives at the Gucci show during Milan Fashion Week Fall/Winter 2016/17 on February 24, 2016 in Milan, Italy. (Photo by Jacopo Raule/Getty Images)
LONDON, ENGLAND - FEBRUARY 23: Elizabeth Olsen attends The Elle Style Awards 2016 on February 23, 2016 in London, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
HOLLYWOOD, CA - JANUARY 12: Elizabeth Olsen arrives at the Stella McCartney Autumn 2016 Presentation on January 12, 2016 in Hollywood, California. (Photo by Steve Granitz/WireImage)
SAVANNAH, GA - OCTOBER 31: Actress Elizabeth Olsen of 'I Saw the Light' poses for a photo during the Closing Night Screening Of 'I Saw the Light' and Awards Presentation at Trustees Theater during 18th Annual Savannah Film Festival Presented by SCAD on October 31, 2015 in Savannah, Georgia. (Photo by Cindy Ord/Getty Images for SCAD)
NASHVILLE, TN - OCTOBER 17: Actress Elizabeth Olsen arrives at the 'I Saw The Light' Nashville Premier at The Belcourt Theatre on October 17, 2015 in Nashville, Tennessee. (Photo by Jason Davis/WireImage)
PARIS, FRANCE - OCTOBER 02: Actress Elizabeth Olsen attends the Christian Dior show as part of the Paris Fashion Week Womenswear Spring/Summer 2016. Held at Cour Carre du Louvre on October 2, 2015 in Paris, France. (Photo by Rindoff/Le Segretain/Getty Images for Dior)
TORONTO, ON - SEPTEMBER 12: Elizabeth Olsen arrives at the 'Trumbo' premiere during the 2015 Toronto International Film Festival held at Elgin Theatre on September 13, 2015 in Toronto, Canada. (Photo by Michael Tran/FilmMagic)
TORONTO, ON - SEPTEMBER 11: Elizabeth Olsen at the 'I Saw The Light' Press Conference at the Fairmont Royal York on September 11, 2015 in Toronto, Ontario. (Photo by Vera Anderson/WireImage)
TORONTO, ON - SEPTEMBER 11: Actress Elizabeth Olsen attends Sony Pictures Classics after party for 'I Saw The Light' sponsored by Lacoste and Ciroc at The Addison Residence on September 11, 2015 in Toronto, Canada. (Photo by Todd Williamson/Getty Images for Sony Pictures Classics)
DEAUVILLE, FRANCE - SEPTEMBER 09: Elizabeth Olsen arrives at the 'Ruth And Alex' Premiere during the 41st Deauville American Film Festival on September 9, 2015 in Deauville, France. (Photo by Francois G. Durand/WireImage)
DEAUVILLE, FRANCE - SEPTEMBER 09: Elizabeth Olsen attends a photocall during the 41st Deauville American Film Festival on September 9, 2015 in Deauville, France. (Photo by Francois Durand/Getty Images)
NEW YORK, NY - APRIL 28: Actress Elizabeth Olsen is seen on April 28, 2015 in New York City. (Photo by ESBP/Star Max/GC Images)
HOLLYWOOD, CA - APRIL 13: Actress Elizabeth Olsen arrives at the Los Angeles premiere of Marvel's 'Avengers: Age Of Ultron' at Dolby Theatre on April 13, 2015 in Hollywood, California. (Photo by Gregg DeGuire/WireImage)
LOS ANGELES, CA - FEBRUARY 20: Actress Elizabeth Olsen arrives at Tom Ford Autumn/Winter 2015 Womenswear Collection Presentation at Milk Studios on February 20, 2015 in Los Angeles, California. (Photo by Jon Kopaloff/FilmMagic)
LOS ANGELES, CA - FEBRUARY 18: Actress Elizabeth Olsen attends VANITY FAIR and Barneys New York Dinner benefiting OXFAM, hosted by Rooney Mara at Chateau Marmont on February 18, 2015 in Los Angeles, California. (Photo by Michael Buckner/Getty Images for Vanity Fair)
PARIS, FRANCE - JANUARY 29: Elizabeth Olsen attends of the Sidaction Gala Dinner 2015 at Pavillon d'Armenonville on January 29, 2015 in Paris, France. (Photo by Rindoff/Dufour/Getty Images)
SAN DIEGO, CA - JULY 26: Elizabeth Olsen attends Marvel's 'Ant-Man' press line during Comic-Con International 2014 at San Diego Convention Center on July 26, 2014 in San Diego, California. (Photo by Jerod Harris/FilmMagic)
LONDON, ENGLAND - MAY 11: Elizabeth Olsen attends the European premiere of 'Godzilla' at Odeon Leicester Square on May 11, 2014 in London, England. (Photo by Mike Marsland/WireImage)
HOLLYWOOD, CA - MAY 08: Elizabeth Olsen arrives at the Los Angeles premiere of 'Godzilla' held at Dolby Theatre on May 8, 2014 in Hollywood, California. (Photo by Michael Tran/FilmMagic)
NEW YORK, NY - MAY 05: Elizabeth Olsen attends the 'Charles James: Beyond Fashion' Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York City. (Photo by Rabbani and Solimene Photography/Getty Images)
PARIS, FRANCE - MARCH 05: Actress Elizabeth Olsen attend the Miu Miu show as part of the Paris Fashion Week Womenswear Fall/Winter 2014-2015 on March 5, 2014 in Paris, France. (Photo by Dominique Charriau/WireImage)
WATCH WHAT HAPPENS LIVE -- Pictured: Elizabeth Olsen -- Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images
HOLLYWOOD, CA - FEBRUARY 06: Actress Elizabeth Olsen attends the premiere of 'In Secret' at ArcLight Hollywood on February 6, 2014 in Hollywood, California. (Photo by Jason LaVeris/FilmMagic)
NEW YORK, NY - NOVEMBER 11: Actress Elizabeth Olsen attends the screening of 'Oldboy' hosted by FilmDistrict and Complex Media with the Cinema Society and Grey Goose at AMC Lincoln Square Theater on November 11, 2013 in New York City. (Photo by Ilya S. Savenok/Getty Images)
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Elizabeth Olsen (Yes, Mary-Kate and Ashley's little sister) donned a stunning floor-length Alexander McQueen gown that had heads turning, including that of the leading man. The 27-year-old blonde bombshell went braless in a white frock complete with a plunging neckline.

A photographer was lucky enough to capture the awkward moment between the pair.

The hunky actor's face is absolutely priceless in the snap:

Britain Captain America Civil War PremiereAP

Need we say more? To make one of the hottest actors in Hollywood literally stop and stare -- well, that's a gift.

But that's not the first time a hilarious situation like this has happened. Remember the iconic 1957 picture of Sofia Loren and Jayne Mansfield?

Loren revealed the hilarious reason she was spotted staring down at Mansfield's ample cleavage.

"I'm staring at her nipples because I am afraid they are about to come onto my plate," she hilariously confessed to Entertainment Weekly.

More celebs who were caught in the act:

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Celebs Caught Peeping At Breasts
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Chris Evans caught staring at Elizabeth Olsen's breasts at 'Captain America' premiere
World Food Programme Ambassador singer Christina Aguilera (L) and US Secretary of State Hillary Clinton pose for a photo next to this year's McGovern Awards that were given to Aguilera and David Novak of Yum Brands, for their help fighting global hunger, on October 3, 2012, at the US Department of State in Washington, DC. AFP Photo/Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/GettyImages)
LOS ANGELES, CA - FEBRUARY 10: (L-R) Actress Portia de Rossi, actress Ellen DeGeneres and singer Katy Perry attend the 55th Annual GRAMMY Awards at STAPLES Center on February 10, 2013 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for NARAS)
LOS ANGELES, CA - FEBRUARY 12: Singers Rihanna and Katy Perry in the audience at the 54th Annual GRAMMY Awards held at Staples Center on February 12, 2012 in Los Angeles, California. (Photo by Larry Busacca/Getty Images For The Recording Academy)
Jake Gyllenhaal and Jennifer Aniston during 18th Annual GLAAD Media Awards - Los Angeles - Backstage at Kodak Theater in Los Angeles, California, United States. (Photo by Jeff Vespa/WireImage)
Jessica Biel and Sean Combs pose at the 64th Annual Golden Globe Awards on Monday, Jan. 15, 2007, in Beverly Hills, Calif. (AP Photo/Kevork Djansezian)
Scarlett Johansson and Woody Allen (Photo by Jon Kopaloff/FilmMagic)
LOS ANGELES - APRIL 10: Actors Kristen Bell (L) and Russell Brand arrive at the premiere of Universal Picture's 'Forgetting Sarah Marshall' at the Chinese Theater on April 10, 2008 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
BERLIN, GERMANY - FEBRUARY 17: Actors Christina Ricci, Holliday Grainger and Robert Pattinson attend the 'Bel Ami' Photocall during day nine of the 62nd Berlin International Film Festival at the Grand Hyatt on February 17, 2012 in Berlin, Germany. (Photo by Pascal Le Segretain/Getty Images)
Actress Reese Witherspoon (L) and actor Robert Pattinson attend the 'Water for Elephants' UK premiere at Vue Westfield on May 3, 2011 in London, England.
HOLLYWOOD - SEPTEMBER 16: (L-R) Simon Cowell, Paula Abdul and Randy Jackson arrive at the The 59th Primetime EMMY Awards TV Guide After Party at Les Deux on September 16, 2007 in Los Angeles (Photo by Alexandra Wyman/WireImage)
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