The 53-year-old Yellowstone star got engaged to the Los Angeles meteorologist during their recent Italian getaway, according to a report by TMZ on Saturday.
The couple traveled extensively across the country, visiting Positano and Naples for a summer holiday, per the outlet’s sources.
Lucas reportedly saw this as the ideal moment to pop the question, given Ruffalo’s ancestral ties to Italy.
The brunette beauty accepted the offer, and upon their arrival in Los Angeles, the couple joyfully shared the news with their families, who are reportedly thrilled for them.
Their engagement caps off a year and a half of dating, starting with a chance meeting at a restaurant while Lucas was on the set of his new show Palm Royale, according to the insiders.
In real life, Lucas successfully won his girlfriend’s heart, but his character in Sweet Home Alabama wasn’t as fortunate.
Lucas gained fame for his role in the 2002 romantic comedy alongside Reese Witherspoon, playing Witherspoon’s estranged husband Jake, while Patrick Dempsey portrayed her fiancé Andrew.
At a red carpet event in May, Ruffalo admitted that she wasn’t cheering for Lucas’ character in the movie, telling E!, ‘I’m Team Patrick Dempsey.’
Ruffalo even joked that her opinion posed an ‘ongoing problem’ in their relationship.
‘From day one, [Brianna] was like, “Oh yeah, you were the other guy,”‘ Lucas chimed in at the time.
‘She was like, “I didn’t like you because you like, stole her from Patrick.”‘
Once, despite her character preference, Lucas and Ruffalo attempted to watch Sweet Home Alabama together, according to the star.
‘We actually watched part of it once and she fell asleep, like, 10 minutes in and was still like, “I’m still Team Patrick,”‘ he said. ‘And that was it.’
The engagement news comes after Lucas spilled the tea on the final chapter of Yellowstone, hinting that fans can expect a supersized send-off.
The actor — who is busy promoting his new show Palm Royale starring Kristen Wiig — revealed that he spoke with the show’s creator about the second half of Season 5, which begins production this summer after a substantial delay.
‘I texted [creator] Taylor Sheridan a couple months ago, and his response was, “Absolutely, we’re going to finish this with 10 episodes or so,”‘ Josh told ET.
The initial segment of Season 5 comprised eight episodes and concluded in January, with the anticipation of the second part’s premiere in November.
After speaking with Taylor, Josh, who plays the younger John Dutton (Kevin Costner’s character) in flashback scenes, said he expects to saddle up once again for Season 5, Part 2.
‘I said, ‘hey man, I’ve loved working on the show so much’ and he’s like, “well we’ll be back,”‘ Josh explained. ‘I can’t wait to go do it.’
Regarding the potential for a spin-off showcasing Lucas in the role of the Montana rancher, Josh said, ‘Man, from your lips to God’s ears. I would love it.’
He added: ‘I mean, obviously I love the world Taylor has created. I love seeing the generational aspect, the time aspect, obviously the 1800s on. So yeah, I would be there in a second.’