Sean “Diddy” Combs just got engaged to singer Cassandra “Cassie” Ventura. No wedding date has been set.

According to a source for Star Magazine, the bachelor father of six “told everyone to keep it extremely quiet because he didn’t want it to get out, but you could tell he was excited.”

Diddy revealed his engagement to the 17-years-younger singer on June 5th at his son Justin’s 8th grade graduation ceremony in Riverdale, N.Y.

The couple met after Combs signed her up to his label, Bad Boy Records, in 2006, before he ended his 10-year relationship with model Kim Porter last July.

Let’s see if it lasts this time.

Hollywire gets word from a reliable source that last night Diddy was seen kissing Cassie at a recording studio in Hollywood. Meaning Diddy might be having sexual relations with a 19 year old singer….No wonder Cassie stresses she is not dating and not looking to date anyone.

The R&B singer Cassie Venture shows us some moves as she promotes her new movie Step Up 2: The Streets. You can check out Cassie in the new issue of of GQ and on Cassie’s offical MySpace Page.

P-Diddy and R&B singer Cassie, 21, are rumored to be dating once again. Cassie has been signed to Bad Boy Records for a couple years and it seems the only way Cassie can keep her music career going is to date her boss.

A source tells PageSix that Diddy has made the decision to “cut off the various girls he has around the world” and settle down with Cassie. The insider adds, “She recently broke up with her boyfriend, and they’re in Miami together now. They’re holed up together in Miami, very low-key. He’s really in love with her.”