Britney Spears and Jason Trawick

Britney Spears is engaged, according to Us Weekly.

The magazine reports that the singer's former agent Jason Trawick proposed Thursday night during his 40th birthday dinner. Friday morning Spears tweeted, "OMG. Last night Jason surprised me with the one gift I've been waiting for. Can't wait to show you! SO SO SO excited!!!!"

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Spears, 30, first met Trawick in 2006 when he became her agent. They began dating in 2009.

Spears, who dated Justin Timberlake for three years, was previously married to Kevin Federline, with whom she has two sons, Sean, 6, and Jayden, 5.