5 Seconds of Summer guitarist announced that his 33-year-old wife, Crystal Leigh, is pregnant with their first child. «I'm filled with excitement and also with nerves,» the 27-year-old musician tells. «I've been a dog dad for a long time, so I think I'm ready for a small human to take care of and communicate with conversationally after eight years of one-sided dog convos!»Leigh adds, «I'm over the moon!!! Completely overflowing with joy, I have never been this happy in my entire life.