Ben Affleck Says Jennifer Garner Was 'Devastated' After Their Son Didn't Like Her Birthday Costume (Exclusive)

Ben Affleck Reveals His Son Samuel's Reaction to Hanging Up His …

Jennifer Lopez Addresses Mom’s Past Comments on Wanting Her Back…

Jennifer Lopez’s 'The Mother' Co-Star Lucy Paez Shares Ben Affle…

Arnold Schwarzenegger’s Son Joseph Baena on His Relationship Wit…

'90 Day Fiancé': Jen Tears Up After Rishi's Mom Says She Too Old…

Michael J. Fox Says He Initially Used Alcohol to Cover Up His Pa…

Inside Chanel's Star-Studded L.A. Fashion Show

How Orlando Bloom’s Driving Skills Were Put to the Test in ‘Gran…

'My Big Fat Greek Wedding 3' Official Trailer

Beyoncé Sports Bee Couture for Renaissance Tour Opening Night in…

Chrishell Stause and G Flip Get Secretly Married After 1 Year of…

ACM Awards: Kimberly Perry on Journey as Solo Artist and Revisit…

'Fast X': Vin Diesel Calls Meadow Walker Joining Franchise 'Dest…

Watch Gwen Stefani's Sweet Tribute to Husband Blake Shelton Duri…

Blake Shelton Admits His Stepson Forgets He's Famous as He Recei…

Jamie Foxx's Daughter Shuts Down Concerns He's Near Death Follow…

Sylvester Stallone's Daughters on How Their Dad Makes it ‘Intimi…

Why Hailey Bieber Feels Scared to Have Kids With Husband Justin

Ariana Madix Shares What She's Learned About Herself From Scando…
Ben Affleck's son's birthday party was more emotional than anticipated.
ET's Nischelle Turner caught up with Affleck at the premiere of his latest flick, Triple Frontier, where the 46-year-old actor dished all about his son Samuel's How to Train Your Dragon themed 7th birthday party. At the fun-filled event, Jennifer Garner, Affleck's ex-wife and Samuel's mom, dressed up as Astrid, the leading lady in the movie. However, it was a move that did not earn her praise from her embarrassed son.
"I was shocked as anybody when I saw Jen come out as Astrid," he admitted. "But then she said Sam was like, 'OK Mom. We already have an Astrid.'"
Though Affleck "didn't go to quite those extremes" in the costume department, he did "participate in a very heavy viking themed How to Train Your Dragon birthday extravaganza," and felt bad that Samuel didn't appreciate his mom's extra effort.
"I felt so bad. She was devastated," Affleck continued with a good-natured laugh. "She had gone to all these lengths to put on the costume."
"We're just not that cool," he added.
Garner first revealed Samuel's reaction to her costume in an Instagram post last week. In the pic, she showed off her fur boots and a matching shawl, along with some leather armor and blue face paint, which made her look like the spitting image of Astrid, who was voiced by America Ferrera in the movie.
"Well, guess what. It turns out seven is the age my kid stops thinking it’s cool when I dress up for the party," Garner captioned the shot before adding hashtags reading "youngest child," "first eye roll," and "anyone need an Astrid?"
In addition to Samuel, Garner and Affleck share two daughters, Violet, 13, and Seraphina, 10. Despite still co-parenting, the formerly married couple have each moved on romantically; Garner with boyfriend John Miller, and Affleck with his potentially former ex, Lindsay Shookus.
Affleck and Shookus have been spotted out and about as of late, following their split six months ago. A source recently told ET that the pair are "hanging out again" and have been "for over a month now."
Triple Frontier hits theaters March 6 and lands on Netflix March 13.
RELATED CONTENT:
Jennifer Garner's Costume Embarrasses Her Son at His 7th Birthday Party
Ben Affleck Shares Son Samuel's Reaction to Him Hanging Up His Batman Cape (Exclusive)
Ben Affleck Is 'Doing Great' 4 Months After Rehab
Related Gallery