Hailee Steinfeld and Josh Allen Are Engaged

Hailee Steinfeld and Josh Allen are engaged ... announcing the news in a romantic Instagram post on Friday.

The actress and the Buffalo Bills QB posted a photo of Allen down on one knee asking Steinfeld to marry him with a beautiful sunset coloring the scene, framed by a gorgeous flower arch.

Waiting for your permission to load the Instagram Media.

Hailee leans down and plants a kiss on Josh's mouth in the snap ... with the caption reading "♾️ 11•22•24 ♾️" -- indicating he popped the question one week ago.

Story Developing ...