Bill Murray threw a party for his movie "Rock The Kasbah" and like a rock star, partied into the wee hours of Tuesday at the Hudson New York City club, Good Units. Who showed up toward the end of the night? Indie rocker and former child star, Jenny Lewis, according to Page Six.

Murray's party was a star-studded affair with the likes of Lady Gaga, Taylor Kinney, Naomi Campbell and Zooey Deschanel in attendance. The "Ghostbusters" star booked the band Chevy Chevis Entertainment for the night and also joined the group to sing the Rascals' "Good Lovin" for the crowd.

"Bill was basically the best party host ever," said an insider, according to Fox News. "He circled the room meeting everyone, pushing people onto the dance floor, and picking ladies out of the crowd and dancing with them. He spent most of the night getting his groove on."

Bruce Willis also took to the stage at the party, dancing his way through "Proud Mary." The bash came to an end with Murray, 65, dancing onstage to the Clash's "Rock The Kasbah" with screenwriter Mitch Glazer before giving a speech, in which he expressed his gratitude towards producer Steve Bing. "All you guys go shake his hand - all you girls go do whatever you think is right," he joked.

Lewis arrived toward the end to meet the host of the party and jumped onstage, too. A source quoted Jenny as Murray's "special friend" who was previously linked to singer, Johnathan Rice. The 39-year-old singer and former child actor was also present at a Hamptons screening of the film after which she was spotted with Murray at a hotel.

Lewis, who makes an appearance in the rockumentary, as well as Murray's Netflix Christmas special "A Very Murray Christmas," later posted a photo of herself with Murray on her Instagram account.

A photo posted by jenny lewis (@jennydianelewis) on Oct 20, 2015 at 9:30am PDT