"The Wolf of Wall Street" star Leonardo DiCaprio reportedly got quite close and personal with "The Fifty Shades of Grey" star Dakota Johnson during the recent "SNL" 40th Anniversary party at The Plaza Hotel.

Life & Style Magazine said that DiCaprio, rumored to be dating hip hop star Rihanna, escorted Johnson around the event and at one put his arm around her.

"He put his arm around Dakota and led her into the grand ballroom," a source told the magazine. "He told her 'let's go look at all the celebrities.'"

In recent weeks, DiCaprio has been linked to Chris Brown's ex Rihanna, with the two being pictured together in New York City as recently as Valentine's Day weekend. On one night, the pair were spotted partying together until the wee hours of the morning at Manhattan hotspot Club Up.

But if DiCaprio's reported flirtations with Johnson are to be believed, there could be trouble in paradise.

"Dakota looked like she was trying to play it cool, but you could tell she was thrilled to have his attention," a source told the magazine. "Out of everyone he socialized with, Leo seemed to be the happiest when he was with Dakota. As they walked away, Leo took the lead and guided her through the crowd, and a small smile spread across her face."

The 40-year-old DiCaprio has previously been romantically linked to models Gisele Bundchen, Bar Refaeli, Erin Heatherton, Kristen Zang and Toni Garrn and actress Blake Lively. He also previously won an Academy Award for Best Supporting Actor for his work in the 1993 comedy-drama "What's Eating Gilbert Grape."

Besides Brown, Rihanna has also been romantically linked to rapper Drake, athletes Matt Kemp and Rashard Lewis and actors Ryan Phillippe, Shia LaBeouf, Ashton Kutcher, Dudley O'Shaughnessy and Justin Timberlake.