Although Real Housewives of New York costar Zarin jumped the proverbial gun on Frankel's baby announcement, this tweet was all about her love for her little "peanut."
"I can't express how happy I am & how beautiful, supportive & thoughtful u all are. Bryn is a tiny beautiful peanut. new chapter begins. thank you," Frankel tweeted from the hospital.
"Happy mother's day to all of u. hopefully momma & the peanut can go home soon. she's tiny."
The 39-year-old chef gave birth to her 4-pound, 12-ounce baby girl Saturday in New York. It's the first child for Frankel and hubby Jason Hoppy, who married in March.
Happy first Mother's Day, Bethenny!
Check out Hollywood's hottest moms in our gallery!