French Montana celebrated his 30th birthday in style last night, bringing in the milestone with a private dinner and party at a mansion in Bel Air. Of course his on-again/off-again beau Khloe Kardashian was by her side – as well as her family – along with Diddy, Cassie, Miguel, Lauren London, Snoop, Warren G, YG, Tyga, Rocsi Diaz and more! French then kept the party going and also hit up the Supperclub where he partied with Floyd Mayweather, Snoop and The Weeknd. Check out tons of pics from the night in the gallery. Happy birthday, French! Haaaan!