EXCLUSIVE: Laura Dern Jokes That Her Upcoming 50th Birthday Isn't Really a Milestone: 'We Don't Discuss Age'

EXCLUSIVE: Laura Dern Hilariously Explains Why Upcoming 50th Bir…

John Cena Dishes on Being a ‘Cool’ and ‘Dorky’ Uncle in ‘Fast X’…

'Fast X': Brie Larson on Adjusting to Fight Sequences Without Su…

'Fast X': Why Michelle Rodriguez Is Hesitant About an All-Female…

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

Vanessa Hudgens and Fiancé Cole Tucker Perform a Karaoke Duet to…

Tia Mowry Marks 'New Era' by Showing Off Her Drastic Haircut!

Harrison Ford Spills on Joining the MCU and Clashing With Brad P…

Colton Underwood on Newlywed Life and Olivia Wilde Wearing White…

Why Jessica Biel’s ‘Devastatingly Nervous’ About Her Sons Growin…

Watch The 'Barbie' Cast Freak Out Over Seeing Their Own Dolls
Laura Dern is gearing up to celebrate her 50th birthday on Friday, and while many would consider it a milestone, the actress says she isn't really thinking of it like that.
Taking a note from her mother, Golden Globe winner Diane Ladd, Dern says she plans on rejecting the concept of birthdays and aging all together.
WATCH: This Is What the Cast of the Original 'Jurassic Park' Movies Look Like Over 20 Years Later
"My mother has made her age, I think, 20 years younger," Dern joked with ET's Nischelle Turner at the premiere of her new HBO series, Big Little Lies, at the Chinese Theatre in Hollywood on Tuesday. "Which means she was like 11 when she had me. So, I think I'm about 44 this year."
"My mom's like, 'I'm an actress, we don't discuss age,' so now, I'm kind of going with that," she added.
Dern also opened up about working on her new crime dramedy series alongside her Wild co-star Reese Witherspoon, who stars in and produces the series.
WATCH: Nicole Kidman and Reese Witherspoon Cover 'Elle' with 'Big Little Lies' Co-Stars!
"I've only known Reese as my producer and [fellow] actress, both on Wild and now on this," Dern said. "So for me, it's an amazing gift."
"She's the most supportive producer, she's an amazing friend and an incredible actor," she added. "It's amazing to have all of that in one person and a beautiful gift to work with."
Big Little Lies premieres Feb. 19 at 9 p.m. ET/PT on HBO.