Arnold Schwarzenegger's estranged wife Maria Shriver is giving fast food a boost by investing in a healthy pizza place in California.

The former First Lady of California has funnelled money into Blaze Pizza, a new chain of restaurants offering nutritious take outs.

She says, "We love pizza. My son and I are really excited to be in the pizza business. We love this concept."

The brand currently has two outlets in California, with three more on the way in Los Angeles.