Amber Rose, Wiz Khalifa Engaged: Star Tweets Giant Ring

Amber Rose is engaged! Well, probably: the voluptuous model (and Kanye's notorious ex-girlfriend) tweeted a photo of what looks like a giant diamond ring on her wedding finger.

"He has made me the Happiest Woman in the World!!!!" Rose, 28, wrote on Thursday, in reference to boyfriend Wiz Khalifa. The couple have been dating for little over one year, having celebrated their first anniversary on January 7 of this year.

For his part, the Grammy-nominated rapper Khalifa, 24, also tweeted: "She Said Yes!!!"

The engagement shouldn't come as a surprise to anybody, not least of all Rose, who was surprised once already a few weeks back at the Grammys.

"We not engaged, not yet," she told E! News.

"Not yet, but soon enough," Khalifa chimed in, to a startled-looking Rose.

He has made me the Happiest Woman in the World!!!! instagr.am/p/Ho_x7HwvEI/

— Amber Rose (@DaRealAmberRose) March 1, 2012

She Said Yes!!! instagr.am/p/Ho_QR4ndvr/

— Wiz Khalifa (@RealWizKhalifa) March 1, 2012

PHOTO:

Check out photos of Rose and Khalifa:

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• 2011 MTV Video Music Awards - Arrivals

  LOS ANGELES, CA - AUGUST 28: Rapper Wiz Khalifa and model Amber Rose arrive at the 2011 MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

• 2011 MTV Video Music Awards - Arrivals

  LOS ANGELES, CA - AUGUST 28: Rapper Wiz Khalifa (L) and model Amber Rose arrive at the 2011 MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

• 2011 MTV Video Music Awards - Arrivals

  LOS ANGELES, CA - AUGUST 28: Rapper Wiz Khalifa and model Amber Rose arrive at the 2011 MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

• 2011 MTV Video Music Awards - Arrivals

  LOS ANGELES, CA - AUGUST 28: Rapper Wiz Khalifa and model Amber Rose arrive at the 2011 MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

• 2011 MTV Video Music Awards - Arrivals

  LOS ANGELES, CA - AUGUST 28: Rapper Wiz Khalifa and model Amber Rose arrive at the 2011 MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

• 2011 MTV Video Music Awards - Arrivals

  LOS ANGELES, CA - AUGUST 28: Rapper Wiz Khalifa (L) and model Amber Rose arrive at the 2011 MTV Video Music Awards at Nokia Theatre L.A. LIVE on August 28, 2011 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

• Amber Rose, Kid Capri, Vikter Duplaix, And Cast Celebrate Premiere Of Smirnoff's Master Of The Mix In NYC

  NEW YORK, NY - NOVEMBER 03: Master of the Mix judge Amber Rose attends Amber Rose, Kid Capri, Vikter Duplaix, and Cast celebration for the Premiere of Smirnoff's Master of the Mix on November 3, 2011 in New York City. (Photo by Michael Stewart/Getty Images for Smirnoff)

• Amber Rose, Kid Capri, Vikter Duplaix, And Cast Celebrate Premiere Of Smirnoff's Master Of The Mix In NYC

  NEW YORK, NY - NOVEMBER 03: Master of the Mix judge Amber Rose attends Amber Rose, Kid Capri, Vikter Duplaix, and Cast celebration for the Premiere of Smirnoff's Master of the Mix on November 3, 2011 in New York City. (Photo by Michael Stewart/Getty Images for Smirnoff)

• Celebrity Front Row Day 5 - LFW Autumn/Winter 2011

  LONDON, ENGLAND - FEBRUARY 22: Amber Rose attends the Bodyamr Fashion Show at London Fashion Week Autumn/Winter 2011 on February 22, 2011 in London, England. (Photo by Gareth Cattermole/Getty Images)

• 2011 Maxim Hot 100 Party - Arrivals

  HOLLYWOOD, CA - MAY 11: Model Amber Rose arrives at Maxim's Hot 100 Party at Eden on May 11, 2011 in Hollywood, California. (Photo by Angela Weiss/Getty Images)

• BET Awards '11 - Arrivals

  LOS ANGELES, CA - JUNE 26: (L-R) Rapper Wiz Khalifa and model Amber Rose arrive at the BET Awards '11 held at the Shrine Auditorium on June 26, 2011 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

• 16th Annual Critics' Choice Movie Awards - Red Carpet

  LOS ANGELES, CA - JANUARY 14: Model Amber Rose arrives at the 16th annual Critics' Choice Movie Awards at the Hollywood Palladium on January 14, 2011 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for VH1)

• 18th Annual ESPY Awards - Arrivals

  LOS ANGELES, CA - JULY 14: Model Amber Rose arrives at the 2010 ESPY Awards at Nokia Theatre L.A. Live on July 14, 2010 in Los Angeles, California. (Photo by Jason Merritt/Getty Images)

• BodyAmr- Runway LFW Spring/Summer 2011

  LONDON - SEPTEMBER 18: Amber Rose models during the BodyAmr s/s 2011 Fashion Show at the Freemasons Hall during London Fashion Week on September 18, 2010 in London, England. (Photo by Samir Hussein/Getty Images)

• Celebrities On The Front Row: Day Three - LFW Spring/Summer 2011

  LONDON - SEPTEMBER 19: Amber Rose attends the Julien Macdonald s/s 2011 fashion show during London Fashion Week on September 19, 2010 in London, England. (Photo by Samir Hussein/Getty Images)

• Pam Hogg - Front Row LFW Spring/Summer 2011

  LONDON, ENGLAND - SEPTEMBER 19: Amber Rose attends the Pam Hogg Spring Summer 2011 fashion show at On/Off during London Fashion Week on September 19, 2010 in London, England. (Photo by Ian Gavan/Getty Images)

• Celebrities On The Front Row: Day Five - LFW Spring/Summer 2011

  LONDON, ENGLAND - SEPTEMBER 21: Amber Rose attends the Issa Spring/Summer 2011 fashion show at Somerset House as part of London Fashion Week on September 21, 2010 in London, England. (Photo by Ian Gavan/Getty Images)

• Christian Siriano - Backstage - Fall 2010 MBFW

  NEW YORK - FEBRUARY 12: Amber Rose backstage at the Christian Siriano Fall 2010 fashion show during Mercedes-Benz Fashion Week on February 12, 2010 in New York, New York. (Photo by Stephen Lovekin/Getty Images for IMG)

• Laura Smalls Fall/Winter 2010 Presentation

  NEW YORK - FEBRUARY 18: Amber Rose attends the Laura Smalls Fall/Winter 2010 presentation at The Plaza Hotel on February 18, 2010 in New York City. (Photo by Neilson Barnard/Getty Images)

• 2010 Vanity Fair Oscar Party Hosted By Graydon Carter - Arrivals

  WEST HOLLYWOOD, CA - MARCH 07: Actress Amber Rose arrives at the 2010 Vanity Fair Oscar Party hosted by Graydon Carter held at Sunset Tower on March 7, 2010 in West Hollywood, California. (Photo by Pascal Le Segretain/Getty Images)

• NYLON & YouTube Young Hollywood Party - Arrivals

  HOLLYWOOD - MAY 12: Model Amber Rose arrives at the NYLON & YouTube Young Hollywood Party at the Roosevelt Hotel on May 12, 2010 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)