The 41-year-old hunk has been flirting up a storm with Pia on Instagram.
Pia commented on his posts, while he said, "agapi mou" which means my love!
The actor starred in the Academy Award winning movie The Danish Girl.
The 35-year-old, who is rumoured to have ended her relationship with Tyson, 30, earlier this year, has been soaking up the sun on island of Kastellorizo in Greece.
Rumours of a breakup first started swirling in January when fans noticed that Tyson hadn’t appeared on Pia’s Instagram since September last year.
In April, it was reported by The Daily Telegraph that the Pia's engagement to Tyson was officially off.
Chilean-born Pia and movie producer Tyson began dating in 2015 and announced their engagement in November 2017.
Pia met Tyson after her marriage to AFL player Brad Miller ended in 2015.
Brad and Pia share a son, Lennox, 12, and Pia has another son, Isaiah, 16, from another relationship.