Amber Tamblyn Reveals Her Daughter's Name in Heartwarming Letter From Hillary Clinton

Amber Tamblyn and David Cross picked a pretty adorable name for their baby girl!

The couple announced their daughter's birth with a cute video on Instagram late last month, but joked about her name, referring to her as "Dauphinoise Petunia Brittany Scheherazade Von Funkinstein Mustard Witch RBG Cross Tamblyn-Bey jr."

However, Tamblyn revealed their daughter's real name on Monday -- Marlow Alice Cross -- thanks to a special letter Marlow received from Hillary Clinton. Dated Feb. 15, Clinton wrote, "Your birth has been a great joy for your parents, Amber and David, and your vast community of admirers and champions. I send my best wishes to you for a lifetime of amazing accomplishments and adventures, full of love, learning, and friendship."

WATCH: Amber Tamblyn and David Cross Welcome a Baby Girl With Best (Fake) Name Ever!

Clearly, the 33-year-old actress was touched by the gesture. Tamblyn is an outspoken supporter of Clinton, and announced her pregnancy in an essay about the 69-year-old politician she wrote for Glamour. 

"The one day I decide to put mascara on Hillary Clinton sends us this letter for our daughter," Tamblyn wrote. "Crying now. A letter from one spectacular woman who has lived so much to another who has only just begun. My heart is as full as this diaper I'm about to change. Thank you, Hillary, grandmother to us all."

WATCH: Amber Tamblyn Tricked Tyrese into Thinking She Was Amber Rose

Last week, Tamblyn showed the realities of motherhood by sharing a selfie of her milk-stained shirt.

"Who Wore It Better? Left tit or right tit? #MilkLife#StarsTheyreJustLikeUs!" she joked.

In January, Tamblyn reunited with her Sisterhood of the Traveling Pants co-stars, America Ferrera and Blake Lively, at women's marches in Washington, D.C. and New York City. Watch below: