American Idol Winner Kris Allen Welcomes Son

"Happy day!!!! My little stud was born today. Oliver is here people," the singer Tweets. The baby boy weighs in at 7 lbs., 7 oz. and is 20¾ inches long. "Mom and baby are doing great," the rep tells PEOPLE.

Allen, 28, and his wife revealed back in January that they were expecting. "I am really excited. I've always wanted to be a dad," Allen later said. "My wife already started buying him clothes like me. He's already got some [fedoras]."

It's been a year of joy but also hardship for Allen. Also in January, he and Katy were involved in a serious car accident that shattered Allen's wrist.