Pakistan, Aug. 16 -- The odds may be in Liam Hemsworth's favor that he'll soon be heading down the aisle with Gabriella Brooks.

The Hunger Games alum and the model officially sparked engagement rumors when Gabriella was seen wearing a massive diamond ring on that finger while celebrating Chris Hemsworth's 42nd birthday in Ibiza, Spain, on Aug. 10.

Liam, 35, and Gabriella, 29, were among those who came out to celebrate the Thor star, joining his close friends Taika Waititi and his wife Rita Ora, as well as Matt Damon and his wife Luciana Barroso. During the outing, Gabriella was seen wearing a yellow polka-dot sundress, black sandals and sunglasses, and completed the look with the diamond ring on her left ring finger, which she put on di...