Zoe Saldana is officially off the market!

The Avatar star is betrothed to her boyfriend Keith Britton - whom she has been with for 10 years - and the 32-year-old actress is said to be “thrilled” to be tying the knot.

“They’ve been together forever. They’re a great couple,” a source close to the couple said.

Zoe has always tried to keep her love life out of the spotlight and on some occasions she doesn’t even introduce the 33-year-old actor - who is also the CEO of My Fashion Database - as her partner. “She doesn’t even introduce him as her fiance. She will just say, ‘This is Keith.’ She likes to keep her personal life to herself and wants people to focus on her as an actress,” said another source.

Even though she is excited about the engagement, Zoe has been so busy working she hasn’t had a chance to start making wedding plans. The screen beauty has already had two movies out this year, The Losers and Death at a Funeral, and has a further two set for release Takers and Burning Palms in 2010. “She hasn’t stopped working to plan anything,” added the second source.