Brown, 19, posted a black and white photo of herself hugged by Bongiovi on the beach and with a large rock on her ring finger.
«I’ve loved you three summers darling I love them all,» the British actor wrote on Instagram, apparently referencing «Lover» by Taylor Swift.
And on Bongiovi’s Instagram, he posted two color images of what appears to be the same beach scene, captioned above a word «forever» with a white heart emoji.
In one image, Bongiovi, 20, hugs Brown while the other shows him looking at her.
Representatives for Brown and Bongiovi could not immediately be reached for comment Tuesday.
The actors made their relationship official, in terms of entertainment, by appearing together on the red carpet before last years British Academy Film Awards.
She is also well connected with him. Enola Holmes franchise on Netflix, serving as the star and producer of the films.
Bongiovi is one of the four children of his Rock & Roll Hall of Fame Dad and mother Dorothea Hurley.
Diana Dasrath contributed.