Arnold Schwarzenegger and Maria Shriver reunites for his birthday
Insider sources say Shriver will go forward with the divorce. REUTERS

This came as a perfect birthday surprise. Not for the birthday boy Arnold, but for his fans all around the world. Just a month after filing for divorce, former Governator Arnold Schwarzenegger and estranged wife Maria Shriver celebrated his 64th birthday, having lunch together.

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. Christopher, who had met with a boogie boarding accident and was hospitalized, was released from the hospital Tuesday.

The pair was also seen shopping together, an E! News quoted a source as saying.

The surprising family get together has come just days after Arnold backed off his initial hardball court papers, which had sought to deny Shriver spousal support, Eonline reported.

Does it mean that the ex-governor of California is getting back together with Shriver? Shriver had filed for divorce recently after she learned that Schwarzenegger had engaged in an adulterous affair and fathered a son with an employee of his, Mildred Baena, 14 years earlier.