Lance Armstrong has blown by cancer, Tour de France cyclists and, soon, New York City Marathon runners.

But it looks as though Ivanka Trump has now left the champion in her wake.

Following rumors that this random pair were going on dates, the daughter of Donald Trump has reportedly hooked up with an even more unexpected celebrity: Topher Grace.

According to Page Six, the former star of That '70s Show and soon-to-be co-star of Spider-Man 3 was spotted with Ivanka at her 25th birthday party in Las Vegas. The duo parties provately at Pure night club, with the curtains closed around their table for a full half-hour.

Before that, they were seen canoodling on the balcony during dinner with friends that included Wilmer Valderrama. There's no word on whether or not fellow pal, Ashston Kutcher, was in town.

But he may have been too busy scolding step-daugther, Rumer Willis.