And it has boyfriend Benji Madden's initials on it

Paris Hilton has sparked speculation she’s engaged after she was snapped with a ring on her third finger, left hand.

The heiress has been dating Good Charlotte rocker Benji Madden for only a month.

But at the Grand Opening of the Kim Vo Salon in Las Vegas on Friday, she proudly displayed the diamond-encrusted ring with the initials BM.

Benji, 28, is the twin brother of Nicole Richie’s fiancé Joel.

Paris Hilton with a BM ring on her wedding finger

Of course, it could just be Paris, 27, teasing the paparazzi.

On Thursday, she also sported a black and silver striped band on her wedding finger while shopping for sunglasses in Beverly Hills.

Paris Hilton with a silver and black band on her wedding finger

See Paris Hilton with her ring in Now’s Celebrity Spy Gallery>>

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SEE VIDEO Paris Hilton in The Hottie And The Nottie…

http://www.youtube.com/watch?v=dynwu0NW2AM&rel=1

SEE VIDEO The Hottie And The Nottie trailer…

http://www.youtube.com/watch?v=Yg4vHg95Xto&rel=1