Cat Deeley has announced she is pregnant with her second child. "Over the moon to share that Milo is going to be a big brother! Can't wait to be a family of four in the spring. We're all so excited," Deeley tweeted Saturday. Deeley is known for her work hosting "So You Think You Can Dance" and "This Time Next Year." She has been married to comedian Patrick Kielty since 2012. Their son Milo turns 2 this week.