Sophia Bush is engaged to her boyfriend Grant Hughes.

The "One Tree Hill" alum revealed the exciting news Tuesday on Instagram, sharing a stunning photo of them together on a boat in Lake Como, Italy, with Hughes down on one knee.

"So it turns out that being your favorite person's favorite person is the actual best feeling on planet Earth," Bush, 39, captioned the image, adding "#YES."

Bush followed up with two more posts. One was of the pair cuddled up on the vessel, captioning it "Forever Favorite," and another of them driving the boat.

Hughes also took to Instagram to make the joyous announcement, choosing to display a snapshot of the newly engaged couple smooching.

"She is my forever Favorite. This is my favorite," he wrote. "And our life is that we're building because she said 'Yes' is already my favorite. I am SO EXCITED to do life with you, my love."

Bush and Grant were friends for eight years before they pursued a romantic relationship with each other amid the pandemic.

In a post from January, the Los Angeles-based entrepreneur said, "[Sophia] was in my life as a friend for 8 years and the pandemic forced us to slow down and stay in one place long enough to realize what I’d been looking for all along was closer than I could have known."

Bush was previously married to her fellow "One Tree Hill" co-star Chad Michael Murray from 2005 to 2006.