He shared photos of the proposal, which apparently took place in Athens, on social media Sunday night.
Fromm, who is now a reserve quarterback with the Buffalo Bills, proposed to Caroline Ostman, who used to play volleyball at UGA.
"I can’t remember what I said, but I do know this; I love you with all my heart and want to spend everyday with you by my side," he wrote on Twitter. "I’m so thankful God put you in my life. Thank you for making me strive to seek Him everyday, helping me become a better man, and of course saying “Yes”."
On Instagram, Ostman shared photos and wrote this: "I get to marry the man of my DREAMS!! William Jacob Fromm I love you with my whole heart and I cannot wait to spend the rest of my life by your side. Yesterday was the sweetest day of my life. I am completely overwhelmed by the Lord’s perfect plan and perfect love. Praise God from whom all blessings flow! Ecclesiastes 4:9-12."