Odd Celebrity Couples: Hayden Panettiere, Lady Gaga and Mary-Kate Olsen Make the List [VIDEO]

"The odd couple" takes on a whole new meaning in the celebrity world.

From singers and athletes, to rappers and reality show stars, couples who people would never have expected to get together in fact have. Some of the stars are even talking about settling down with their significant other.

Nashville actress Hayden Panettiere reportedly got engaged recently to Ukrainian fighter Wladamir Klitschko. Although the two broke up in 2011 after a two-year romance, they are in love again and plan to get married. Panettiere is already talking about having kids.

“I’ve lived a very big life and I don’t feel my age and I feel like I was born to be a mother,” she told Glamour.

Lady Gaga constantly surprises when it comes to her style and music, and now with her love life. The pop singer found romance with actor Taylor Kinney and is also ready for a family.

“Lately all Gaga can talk about is settling down with Taylor. She’s really eager to get married and start a family with him,” a source said to Radar Online.

Mary-Kate Olsen clearly has no problem dating older men. The 26-year-old Full House twin has been locking lips with 43-year-old Olivier Sarkozy, the brother of France's former president. The two have been dating since May 2012.

See more of Hollywood’s oddest couples by clicking here.

Check out some of the Hollywood couples dubbed 2012's oddest.