Simon Cowell has babies on the brain!

In a new interview, Simon — who welcomed his first child with girlfriend Lauren Silverman, 37, last Valentine's Day — admits he is considering giving son Eric a little brother or sister in the future!

"I wouldn’t rule anything out right now," the 55-year-old said about baby No. 2 in a new interview. “The last year has been kind of unexpected but good, I’m enjoying it.”

simon cowell son
Twitter/@simoncowell

Simon with Eric on Jan. 15, 2015.

“[Fatherhood has] been fun and much easier than I thought," he added. “[Eric is] adorable, so maybe I just won’t make plans and see what happens."

Related Story: Simon Cowell Welcomes a New Addition — See the Adorable Puppy!

The former 'American Idol' judge and his partner — who has an older son from a previous marriage — first publicly confirmed their relationship in July 2013 after Lauren went through a messy divorce. The couple's son, Eric, was born on Feb. 14, 2014.

simon cowell and lauren silverman

Simon and Lauren on Feb. 3, 2015.

According to Simon's friend Louis Walsh, the star is gearing up to propose to Lauren sometime this year.

“I never thought I’d say Simon’s going to get married, but I think he’s going to get married," Walsh revealed to the 'Daily Star.' "Lauren’s really good for him, I think he’s going to marry her, I really do."