OK! Exclusive: Katharine McPhee Married!

According to a source close to singer Katharine McPhee, the 23-year-old American Idol runner-up was married to her boyfriend, actor Nick Cokas in a ceremony in Los Angeles on Saturday.

In September, OK! was that Kat and Nick, who is 19 years older than his new bride, were engaged. And only a few weeks ago, the singer confessed to OK! that she was desperately trying to get in shape for the wedding.

"I do 20 to 30 minutes of cardio three times a week if I’m lucky, four times if I’m really lucky," Katharine told OK!'s blog. "I just started doing lunges with dumbbells, and I just started doing shoulder stuff, arm stuff, back stuff.”