'How did we get so lucky to have you?"

BUFFALO, N.Y. (WBEN).....Actress Hailee Steinfeld, wife of Buffalo Bills quarterback Josh Allen, has revealed the name of the couple's daughter in a love letter she wrote to the two-month-old baby in her "Beau Society" newsletter.

The baby's name was shrouded in mystery since she was born on April 2.

But, in a lengthy love letter written in Beau Society's 90th episode, Steinfeld reveals the couple's daughter name is Harper Haize Allen.

Writing the love letter came from a fan's online comment made to Steinfeld.

"It made me think about how much I've changed in the very short time since she entered our world," Steinfeld wrote.

In her letter, Steinfeld addresses baby Harper and writes:

"You've only been here a short while now - somehow it feels as though you've always been ours."

"There are moments (like right now, as you sleep so soundly on my chest), I still look at you and wonder how you're real."

Steinfeld said the last two months have been, alternately, "beautiful, exhausting, sacred and so special."

"I no longer measure time in months of years, but in ounces, naps missed and naps miraculously taken."

Steinfeld wrote that she and Josh Allen often times ask the same question..."How did we get so lucky to have you?"

And, baby Harper has already taught her parents a lesson, or two.

"Truth is, that already, youhave taught me for more than I could ever teach you," Steinfeld wrote.