When Best Supporting Actor winner Jared Leto stopped by Oscar host Ellen DeGeneres' show on Monday, March 3, he had some hilarious tidbits to share -- including a very special dance partner of his mom's.

"One of the highlights of the night was seeing my mom dancing with Madonna," Leto dished about the  star-studded after-party. It's no surprise that that was a standout moment for Leto -- after all, he graciously thanked his mom in his emotional acceptance speech.

Another memory that sticks in his head? When Harrison Ford accidentally spilled pizza all over himself.

"When you handed out the pizza, Harrison Ford grabbed a slice - he was very hungry - I saw him take a big bite," the 'Dallas Buyers Club' actor recalled to DeGeneres. "I looked over my shoulder -- right down his shirt," Leto said, imitating a splatting noise.

But not everything is so great for the newly minted Best Supporting Actor -- he still needs to deal with paparazzi, who were immediately hounding him after his win.

"There were paparazzi waiting outside my house this morning," Leto revealed. "I don't know [if they were there] to celebrate the day with me or to find out who else I was sleeping with." (Though he was reportedly hooking up with Lupita Nyong'o and Miley Cyrus, Leto set the record straight -- he's actually dating 84-year-old June Squibb. Natch.)

So, what's next for the big winner? Back to business! Only this time, Leto is focusing on his music: his band 30 Seconds to Mars just announced a huge co-headlining tour with Linkin Park.

Watch Jared Leto on 'Ellen' below: