Wilmer, 32, and Minka, 31, appeared together at the opening of Marquee-Te Star at Star Resort in Sydney, Australia over the weekend.
On Tuesday, the air was seen on a walk along the water at Balmoral, with their arms around each other, People reports.
What is more, Wilmer tweeted a photo of himself and Minka on a boat ride in Sydney. The actress re-tweeted it with the caption, “So fun!”
Rumors of a bussing romance first surfaced after the two put on a PDA show at club Greystone Manor in LA on March 17.
Kelly split from Yankee captain Derek Jeter in August after three years together.