HEM / BACKGRID; Kelly Gores/Instagram Robin Thicke and April Love Geary got married on Friday, May 30, in Cabo San Lucas, Mexico, following a six-year engagement Among Thicke's groomsmen were his good friend Usher and his 15-year-old son, Julian, whom he shares with ex-wife Paula Patton Other celebrity guests at the wedding reportedly included Leonardo DiCaprio and Ken Jeong Robin ThickeandApril Love Gearyhad the support of one close celebrity friend at the altar —Usher. The "My Boo" singer, 46, served as one of Thicke's seven groomsmen when he and Gearytied the knotin Cabo San Lucas, Mexico, on Friday, May 30. In photos of the nuptials shared on social media, Usher could be seen standing toward the end of the groomsmen line in a sleek black suit with a black bow tie and dress shoes, matching Thicke, 48, who wore the same classic attire. He also could be seen clapping happily for his friend as he and Geary, 30, exchanged vows and rings. Kelly Gores/Instagram The "Blurred Lines" singer's 15-year-old son, Julian — whom he shares with ex-wifePaula Patton— was also a groomsman, and could be seen lined up closer to the front of the altar, smiling and clapping as he got a front-row view of his dad's wedding ceremony. Usher wasn't the only star to attend the glamorous wedding. Other celebrities who reportedly made the guest list includeLeonardo DiCaprioandKen Jeong, according toTMZ. Many of Thicke and Geary's guests arrived early to kick off the weekend festivities. On Friday, May 30, Stormi Bree shared snaps from a sparkler-filled, all-white welcome party. Kelly Gores/Instagram Thicke's three children with Geary — 7-year-old daughterMia, 6-year-old daughterLolaand 4-year-old sonLuca Patrick— could also be seen getting in on the wedding festivities. Thicke and Geary's nuptials have been a long time coming, considering the couple has been in a relationship for more than a decade. The "Wanna Love You Girl" singer started dating Geary in the months following his separation from Patton in February 2014. Pattonfiled for divorcein October 2014 and in March 2015, theirdivorce was finalized. Two months later in May 2015, Thicke and Geary made theirfirst public appearance togetherat the Cannes Film Festival. Jamie McCarthy/Getty Never miss a story — sign up forPEOPLE's free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from celebrity news to compelling human interest stories. On Christmas Eve in 2018, Gearyannounced her engagementto Thicke onInstagram. She shared a video of the proposal alongside two couple holiday photos, writing, "YES YES 1000x YES 😭😭💍." About six and a half years later, Thickepopped the question again. He dropped down on one knee and proposed for a second time on the steps of the Hôtel du Cap-Eden-Roc in Cannes, France — the same place the pair made their public debut as a couple 10 years ago. The pair shared photos of the surprise second proposal via a joint post onInstagramon May 25, less than a week before their wedding. "This trip was such a dream. 🤍 I love you so much," Geary wrote in the post's caption in part. Read the original article onPeople