Professional football player Phil Costa, who plays center for the Dallas Cowboys, was photographed on one knee in front of a surprised Brooke.
Brooke later shared the photo on Instagram, writing, "Happiest moment of my LIFE. I am marrying my best friend."
"I wouldn't choose anyone else. I am so lucky and so grateful. I look scary but this is the face of total SHOCK."
The fake Eiffel Tower at the Paris Hotel is in the background, so the proposal must have occurred at the Bellagio Hotel in Las Vegas.
We wish the couple the best of luck!