Party Report: Paris Jackson’s Birthday, Miley Cyrus and Mayor Garcetti, Reigning Oscar Winners Convene (Photos)

Michael Jackson's daughter Paris draws an Oscar winner, showrunners, and "the other Paris" around cake to celebrate her birthday. Plus: Martin Garrix toasts a new doc and Miley Cyrus gets down with the "Instagram Mayor."

The reigning best actors in the industry, Best Supporting Oscar winner Sam Rockwell (left) and Best Actor winner Gary Oldman (right) were joined by Elisa Pugliese and Keegan-Michael Key at Paul Smith's dinner tribute to the "Darkest Hour" star at the Chateau Marmont on Tuesday night.  

Miley Cyrus was the guest of honor at the 30th anniversary gala for "My Friend's Place" on Saturday night, a Hollywood-based shelter helping homeless youth. Backstage she posed with Jack Black and Mayor Eric Garcetti.  Also Read: Miley Cyrus Spanked for Posting Racy Photo of Easter Bunny Smacking Her Behind

The night before, Paris Jackson's 20th birthday party at Hyde Sunset in Hollywood showed that the fashion model has clout. Guests included (from left), Evan Ross, Lee Daniels, Tom Hamilton and DJ Caroline D'Amore, who gave the birthday girl a lift.

Paris subscribes to the superstition that you should smear your name before you cut the cake. Also Read: ‘Atlanta': 9 Teddy Perkins-Michael Jackson Parallels That Aren’t So Obvious

For Ross (2nd from left with wife Ashlee Simpson), this is a multi-generational friendship. Mom Diana Ross and Michael Jackson were close friends and collaborators.

Sibling Goals: Prince Michael and Paris. They celebrated National Sibling Day early. Also Read: Hollywood Filmmaker Brothers, From the Russos to the Weinsteins (Photos)  

The Hilton parents, Rick and Kathy, added an "en loco parentis" note of gravitas to the festivities.  

Frankie Delgado, the "Hills" era nightclub maven, is still a fixture on the scene. Also Read: Calvin Harris, Zedd Christen Cabo’s Omnia Dayclub in Mexico (Photos)

Remember when this Paris was the it-girl in Hollywood? The two Parisians posted this shot on social media.

Lots more famous musical families were in town this week. Nicole Richie and Joel Madden met Frances Bean Cobain at the Daily Front Row's packed Fashion Los Angeles Awards. Chrissy Teigen, Kris Jenner, Emily Ratajkowski, Rowan Blanchard and Jeremy Scott all filled the Beverly Hills Hotel, signaling that the NY fashion world considers the long-running hotel boycott over human rights to be over. 

The elder Paris is now fully entrenched in the electronic music world. In addition to routinely attending EDC and spinning around the world, she turned at director Bert Marcus' premiere of "What We Started" during the recent Miami Music Week. The doc charts the evolution of dance music culture via youngster Martin Garrix and rave originator Carl Cox (right). 

Unlike Hollywood actors who arrive for the red carpet and intros and then disappear until the after party, Garrix sat through Lincoln Road screening.

Afrojack worked in a visit with director Bert Marcus two nights before he played the Ultra Main Stage. The film arrives on Netflix this June. Also Read: Ultra Music Festival 2018: Will Smith Gives Surprise Performance at Miami Rave (Photos)