Kelly Osbourne announced on Thursday that she is pregnant with her and boyfriend Sid Wilson‘s first baby. She announced the news on Instagram along with selfies showing off some ultrasound photos. “I am over the moon to announce that I am going to be a Mumma. To say that I am happy does not quite cut it. I am ecstatic!” Osbourne wrote alongside the sweet photos. Osbourne and Wilson, a DJ best known as the turntablist for the band Slipknot, have known each other for 23 years but only started seeing each other romantically a few months ago. Osbourne has wanted children for a while but said on Re…