The former couple first made their public debut back in May 2012. The Cruel Intentions star then proposed to the 25-year-old law student over Christmas 2015.
Ryan and Paulina in 2014.
Ryan, 42, was previously married to Reese Witherspoon, with whom he has two children, daughter Ava, 17, and son Deacon, 13. He is also dad to a five-year-old daughter from a previous relationship with actress and singer Alexis Knapp.