bspearswedding082810_04_X17460WM.jpg

After two years as a couple, Britney Spears is engaged to longtime beau Jason Trawick, according to Us Weekly.

Jason reportedly popped the question last night at a private romantic dinner, while celebrating his 40th birthday.

A source tells the mag:

    "This is something they've both wanted for a long time. It's a way to cement their family. They're both extremely happy and can't wait to become man and wife."


Spears hinted that she had some exciting news when she Tweeted the following message this morning:

    "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!!!! Xxo"


The pair began a friendship after meeting in 2006 while Trawick was working for William Morris Agency. The former agent began representing Spears while she was still married to Kevin Federline ... and stuck by her during personal struggles in 2007 and 2008. Brit and Jason went public with their romance in 2009.

The newly-engaged couple will reportedly celebrate the happy news with friends and family with a big celebration in Las Vegas tonight.