Paris and Thomas, a self-made tycoon with an estimated fortune of $200 million, have reportedly been dating since May and she repeatedly refers to him as her "soulmate" on Instagram.
A source previously said: "They met at the Cannes Film Festival in May and have been dating ever since. They are having a lot of fun getting to know each other.
"She is thrilled she has found a real man who is such a gentleman. Paris loves the way he treats her and they are having a good time."
Paris - who split from model River Viiperi last summer after two years of dating - recently admitted that she desperately wants to start a family.
She said: "I feel like I've pretty much done everything I've wanted to do. I've done music, designing, TV, everything. The one thing I didn't get involved in until a couple of years ago is real estate, and now I'm following in my family's footsteps, opening my own properties - I love that. But next is (definitely) having a family."
- Bang! Showbiz