Mercer took to social media site Snapchat on Thursday (17Sep15) to show off a massive sparkler on her ring finger, and simply captioned the shot, "Yes!" She added, "When it's real, you just know."

Her pal, model Amber Rose subsequently re-posted the message on, writing, "Congrats to my girl @lira_galore and @richforever Love is a beautiful thing."

The couple reportedly began dating earlier this year (15), but Mercer has been a big fan of the rapper for years - in a 2102 tweet, she wrote: "Ima (sic) Marry Rick Ross My fat boy lol (laugh out loud)."

This will be the first marriage for the Hustlin' hitmaker. Ross has yet to comment on the rumours.