Ironically, Sliwinska was also paired with Hamilton's father George during Dancing with the Stars' second season.
In addition, Olympic gold medalist swimmer Natalie Coughlin revealed Tuesday on her Twitter page that she has been paired with Alec Mazo.
"So I got partnered with Alec!!! So good because we both went to Cal Berkeley and studied Psychology at the same time. Go Bears!" posted Coughlin. "Practice is going well although it's a lot harder than I thought!!! I didn't know Alec when we went to Cal (even though we probably shared classes!)."
ABC will officially reveal Dancing with the Stars' ninth-season pairings on Monday's Good Morning America broadcast.
In addition to the aforementioned celebrities, the other celebrities competing for the mirror ball trophy are singer Aaron Carter; martial artist Mark Dacascos; indicted former House Majority Leader Tom DeLay; singer Macy Gray; actress Melissa Joan Hart; former supermodel Kathy Ireland; retired NFL star Michael Irvin; model and actress Joanna Krupa; UFC mixed martial arts fighter Chuck Liddell; singer Mya; former The Osbournes star Kelly Osbourne; and professional snowboarder Louie Vito.
Dancing with the Stars' ninth season will premiere with a two-hour performance episode on Monday, September 21 at 8PM ET/PT.