Rachel McAdams shows off her cheeky side in sheer gown post-baby

The 39-year-old actress needs no time bouncing back post giving birth!

Rachel McAdams made her first red carpet appearance since giving birth to her son with boyfriend, Jamie Linden. The movie star stunned at the 'Disobedience' premiere at the Tribeca Film Festival with co-star, Rachel Weisz by her side. While Weisz went for a more conservative dress with slight cut-outs on the shoulders, McAdams opted for a romantic plunging floral gown from Giambattista Valli Spring '18. 

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Rachel McAdams at the 'Disobedience' premiere
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Rachel McAdams at the 'Disobedience' premiere
NEW YORK, NY - APRIL 24: Actress Rachel McAdams attends the 'Disobedience' premiere during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 24, 2018 in New York City. (Photo by Roy Rochlin/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 24: Actress Rachel McAdams attends the 'Disobedience' premiere during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 24, 2018 in New York City. (Photo by Jim Spellman/WireImage)
NEW YORK, NY - APRIL 24: Director Sebastian Lelio, actors Rachel McAdams; Rachel Weisz and Alessandro Nivola attends the 'Disobedience' premiere during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 24, 2018 in New York City. (Photo by Roy Rochlin/Getty Images for Tribeca Film Festival)
NEW YORK, USA - APRIL 24: Rachel McAdams attends a screening of 'Disobedience' during the Tribeca Film Festival at the BMCC Tribeca PAC in New York, United States on April 24, 2018. (Photo by Atilgan Ozdil/Anadolu Agency/Getty Images)
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The sheer tulle skirt left little to the imagination, showing off a cheeky glimpse of McAdams envious physique. With her hair pulled back into a beachy updo and subtle pink lips, it's safe to say she's never looked chicer. 

Check out more of our favorite Tribeca Film Festival moments in the gallery below!

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Celebs at 2018 Tribeca Film Festival
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Celebs at 2018 Tribeca Film Festival
NEW YORK, NY - APRIL 27: Businesswoman Nicky Hilton Rothschild is seen arriving to the screening of 'The American Meme' during the 2018 Tribeca Film Festival at Spring Studios on April 27, 2018 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
NEW YORK, NY - APRIL 27: Actress Paris Hilton is seen arriving to the screening of 'The American Meme' during the 2018 Tribeca Film Festival at Spring Studios on April 27, 2018 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
NEW YORK, NY - APRIL 28: Julianne Moore attends 'Time's Up' during the 2018 Tribeca Film Festival at Spring Studios on April 28, 2018 in New York City. (Photo by Astrid Stawiarz/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 27: Paris Hilton (L) and Hailey Baldwin attend 'The American Meme' screening premiere during the 2018 Tribeca Film Festival at Spring Studios on April 27, 2018 in New York City. (Photo by Gary Gershoff/WireImage)
NEW YORK, NY - APRIL 27: Viola Davis attends the 2018 Tribeca Film Festival screening of 'The Last Defense' at SVA Theater on April 27, 2018 in New York City. (Photo by Paul Zimmerman/WireImage)
NEW YORK, NY - APRIL 19: Actor Ethan Hawke attends a screening of 'Stockholm' during the 2018 Tribeca Film Festival at SVA Theatre on April 19, 2018 in New York City. (Photo by Astrid Stawiarz/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 28: Lupita Nyong'o speaks onstage at 'Time's Up' during the 2018 Tribeca Film Festival at Spring Studios on April 28, 2018 in New York City. (Photo by Roy Rochlin/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 26: Actress Claire Danes attends Director's Series: Lesli Linka Glatter with Claire Danes during 2018 Tribeca Film Festival at Spring Studios on April 26, 2018 in New York City. (Photo by Ilya S. Savenok/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 26: (L-R) Steven Spielberg, Liam Neeson and Sir Ben Kingsley attend the 2018 Tribeca Film Festival - 'Schindler's List' Reunion at Beacon Theatre on April 26, 2018 in New York City. (Photo by Paul Zimmerman/WireImage)
NEW YORK, NY - APRIL 24: Actress Rachel Weisz attends the 'Disobedience' premiere during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 24, 2018 in New York City. (Photo by Jim Spellman/WireImage)
NEW YORK, USA - APRIL 24: Rachel McAdams attends a screening of 'Disobedience' during the Tribeca Film Festival at the BMCC Tribeca PAC in New York, United States on April 24, 2018. (Photo by Atilgan Ozdil/Anadolu Agency/Getty Images)
NEW YORK, NY - APRIL 23: Bruce Springsteen performs during 'Horses: Patti Smith and Her Band' - 2018 Tribeca Film Festival at Beacon Theatre on April 23, 2018 in New York City. (Photo by Theo Wargo/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 23: Actor Jamie Foxx attends the 2018 Tribeca Film Festival - Tribeca Talks: Storytellers - at BMCC Tribeca PAC on April 23, 2018 in New York City. (Photo by Paul Zimmerman/WireImage)
NEW YORK, USA - APRIL 23: Patti Smith, attends a screening of 'Horses' during the Tribeca Film Festival at Beacon Theatre in New York, United States on April 23, 2018. (Photo by Atilgan Ozdil/Anadolu Agency/Getty Images)
NEW YORK, NY - APRIL 21: Saoirse Ronan is seen attending 'The Seagull' premiere during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 21, 2018 in New York City. (Photo by Nancy Rivera/Bauer-Griffin/GC Images)
NEW YORK, NY - APRIL 22: Chloe Grace Moretz attend 'The Miseducation of Cameron Post' premiere during the Tribeca Film Festival at BMCC Tribeca PAC on April 22, 2018 in New York City. (Photo by Ben Gabbe/Getty Images for Tribeca Film Festival)
Christina Hendricks at the afterparty for "Egg," hosted by the IMDbPro App at TAO Downtown, in an eye-popping black lace top.
NEW YORK, NY - APRIL 20: Actor Antonio Banderas attends 'Genius: Picasso' during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 20, 2018 in New York City. (Photo by Gary Gershoff/WireImage)
NEW YORK, NY - APRIL 21: Bradley Cooper and Robert De Niro attend the Storytellers: Bradley Cooper & Robert DeNiro talk during 2018 Tribeca Film Festival at Spring Studios on April 21, 2018 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 21: Whoopi Goldberg attends the Shorts Program: The History of White People in America during the 2018 Tribeca Film Festival at Regal Battery Park 11 on April 21, 2018 in New York City. (Photo by Roy Rochlin/Getty Images for Tribeca Film Festival)
Aubrey Plaza (L) and Alia Shawkat attend the after party hosted by Ciroc for 'Duck Butter' during the 2018 Tribeca Film Festival at Bar Gonzo on April 20, 2018 in New York City. (Photo by Michael Loccisano/Getty Images for 2018 Tribeca Film Festival)
NEW YORK, NY - APRIL 21: Violetta Komyshan and actor Ansel Elgort arrives to the 'Jonathan' screening during the 2018 Tribeca Film Festival at SVA Theater on April 21, 2018 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
Alec Baldwin and Annette Bening attend 'The Seagull' screening during 2018 Tribeca Film Festival at SVA Theatre on April 21, 2018 in New York City. (Photo by ANGELA WEISS / AFP) (Photo credit should read ANGELA WEISS/AFP/Getty Images)
Annette Bening and Saoirse Ronan were among the guests at the afterparty for "The Seagull," hosted by Bulleit at Mailroom.
NEW YORK, NY - APRIL 21: Ewan McGregor attends the 'Zoe' premiere during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 21, 2018 in New York City. (Photo by Ben Gabbe/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 19: Michelle Pfeiffer attends a screening of 'Scarface' during the 2018 Tribeca Film Festival at Beacon Theatre on April 19, 2018 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK, NY - APRIL 19: Actor Al Pacino attends a screening of 'Scarface' during the 2018 Tribeca Film Festival at Beacon Theatre on April 19, 2018 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK, NY - APRIL 19: Michelle Pfeiffer and Al Pacino attend the 'Scarface' 35th Anniversary Cast Reunion - 2018 Tribeca Film Festival at Beacon Theatre on April 19, 2018 in New York City. (Photo by Theo Wargo/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 19: John Legend attends the 2018 Tribeca Film Festival - Tribeca Talks: Storytellers - John Legend at SVA Theater on April 19, 2018 in New York City. (Photo by Paul Zimmerman/WireImage)
NEW YORK, NY - APRIL 19: Sarah Jessica Parker arrives to the 2018 Tribeca Film Festival - 'Blue Night' at SVA Theatre on April 19, 2018 in New York City. (Photo by James Devaney/GC Images)
NEW YORK, NY - APRIL 19: Actors Matthew Broderick and Sarah Jessica Parker are seen leaving the 2018 Tribeca Film Festival after-party for 'Blue Night' hosted by Nespresso at The Ainsworth on April 19, 2018 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
Ewan McGregor hit the afterparty for ZOE, where guests were treated to bites by Nutella at The Ainsworth FiDi.
NEW YORK, NY - APRIL 19: Thandie Newton attends 'Westworld' during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 19, 2018 in New York City. (Photo by John Lamparski/WireImage)
NEW YORK, NY - APRIL 19: James Marsden attends 'Westworld' during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 19, 2018 in New York City. (Photo by John Lamparski/WireImage)
NEW YORK, NY - APRIL 19: Evan Rachel Wood attends 'Westworld' during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 19, 2018 in New York City. (Photo by John Lamparski/WireImage)
NEW YORK, NY - APRIL 18: Ray Liotta and Silva Lombardo attend the Opening Night Gala of 'Love, Gilda' - 2018 Tribeca Film Festival at Beacon Theatre on April 18, 2018 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Tribeca Film Festival)
NEW YORK, NY, UNITED STATES - 2018/04/18: Ray Liotta and Silva Lombardo at the Tribeca Film Festival red carpet arrivals for the film 'Love, Gilda' at the Beacon Theatre. (Photo by Michael Brochstein/SOPA Images/LightRocket via Getty Images)
NEW YORK, NY - APRIL 18: Tina Fey attends the Opening Night Gala of 'Love, Gilda' during the 2018 Tribeca Film Festival at Beacon Theatre on April 18, 2018 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK, NY - APRIL 18: Robert De Niro attends the opening night gala of 'Love, Gilda' during the 2018 Tribeca Film Festival at Beacon Theatre on April 18, 2018 in New York City. (Photo by Dia Dipasupil/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 18: Lorne Michaels attends the Opening Night Gala of 'Love, Gilda' during the 2018 Tribeca Film Festival at Beacon Theatre on April 18, 2018 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK, NY - APRIL 18: Chevy Chase attends the Opening Night Gala of 'Love, Gilda' during the 2018 Tribeca Film Festival at Beacon Theatre on April 18, 2018 in New York City. (Photo by Taylor Hill/FilmMagic)
Billy Crystal attends the 2018 Tribeca Film Festival opening night premiere of 'Love, Gilda' at Beacon Theatre on April 18, 2018 in New York City. / AFP PHOTO / ANGELA WEISS (Photo credit should read ANGELA WEISS/AFP/Getty Images)
NEW YORK, NY - APRIL 18: Keegan-Michael Key attends the Opening Night Gala of 'Love, Gilda' during the 2018 Tribeca Film Festival at Beacon Theatre on April 18, 2018 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK, NY - APRIL 18: Paul Shaffer attends the Opening Night Gala of 'Love, Gilda' - 2018 Tribeca Film Festival at Beacon Theatre on April 18, 2018 in New York City. (Photo by Dimitrios Kambouris/Getty Images for Tribeca Film Festival)
NEW YORK, NY, UNITED STATES - 2018/04/18: Gilbert Gottfried at the Tribeca Film Festival red carpet arrivals for the film 'Love, Gilda' at the Beacon Theatre. (Photo by Michael Brochstein/SOPA Images/LightRocket via Getty Images)
Cobie Smulders attends the 2018 Tribeca Film Festival opening night premiere of 'Love, Gilda' at Beacon Theatre on April 18, 2018 in New York City. / AFP PHOTO / ANGELA WEISS (Photo credit should read ANGELA WEISS/AFP/Getty Images)
Jenny Cipolett of Margo and Me at the Chloe Wine Collection screening of the film 'Blue Night'.
NEW YORK, NY - APRIL 19: Musician Common attends a screening of 'Blue Night' during the 2018 Tribeca Film Festival at SVA Theatre on April 19, 2018 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
NEW YORK, NY - APRIL 19: Actress Jacqueline Bisset is seen arriving to the 2018 Tribeca Film Festival after-party for 'Blue Night' hosted by Nespresso at The Ainsworth on April 19, 2018 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
NEW YORK, NY - APRIL 19: Actor Martin Freeman attends 'Cargo' Red Carpet Premiere - 2018 Tribeca Film Festival at SVA Theatre on April 19, 2018 in New York City. (Photo by Bryan Bedder/Getty Images for Netflix)
NEW YORK, NY - APRIL 19: Sara Bareilles attends the 2018 Tribeca Film Festival - Tribeca Talks: Storytellers - John Legend at SVA Theater on April 19, 2018 in New York City. (Photo by Paul Zimmerman/WireImage)
NEW YORK, NY - APRIL 20: Actress Jennifer Morrison leaving the screening of 'Back Roads' during the Tribeca Film Festival at Cinepolis Chelsea on April 20, 2018 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
NEW YORK, NY - APRIL 20: Actor T.R. Knight attends 'Genius: Picasso' during the 2018 Tribeca Film Festival at BMCC Tribeca PAC on April 20, 2018 in New York City. (Photo by Gary Gershoff/WireImage)
NEW YORK, NY - APRIL 20: Elijah Wood attends the screening of '7 Stages to Achieve Eternal Bliss By Passing Through The Gateway Chosen By the Holy Storsh' during the Tribeca Film Festival at SVA Theatre on April 20, 2018 in New York City. (Photo by Jamie McCarthy/Getty Images for Tribeca Film Festival)
NEW YORK, NY - APRIL 22: Actress Eliza Dushku arriving to the Screening of 'Mapplethorpe' during the 2018 Tribeca Film Festival at SVA Theatre on April 22, 2018 in New York City. (Photo by Gilbert Carrasquillo/GC Images)
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