Arnold Schwarzenegger Celebrates Birthday With Maria Shriver

Pair went out for lunch to kick off the former governor's big 64th birthday

Talk about a birthday surprise.

Just a month after filing for divorce from Arnold Schwarzenegger, Maria Shriver accompanied her former hubby to lunch to celebrate his 64th birthday.

And they weren't alone...

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As they dined at Barney's in Beverly Hills Saturday, Shriver and Schwarzenegger were joined by two of their four children, sons Patrick and Christopher, according to Us Weekly. The latter was released from the hospital Tuesday after a bodysurfing accident.

A source tells E! News that the pair were seen shopping together, as well.

The surprising family meal comes days after the former Governator backed off his initial hardball court papers, which had sought to deny Shriver spousal support.

Speaking of spousal support, Shriver reportedly picked up the lunch tab and ordered the birthday boy an espresso.

That is one classy, lady.