Alexander Skarsgard! The actor confirmed that he welcomed his first child with girlfriend Tuva Novotny to ET's Rachel Smith at the season 4 premiere Monday evening at the Jazz at Lincoln Center in New York City.«Thank you very much,» Skarsgard said with a smile when he was congratulated on his family's new bundle of joy. Skarsgard and Novotny were spotted out in November with their baby.He proudly showed off a stuffed animal he received at the premiere. «I got this on the red carpet,» the 46-year-old actor said, sharing a glimpse of the toy. «Thank you, thank you.»On the critically-lauded HBO drama, Skarsgard plays Lukas Matsson, a savvy tech CEO whose streaming company, GoJo, is merging with Logan Roy's Waystar Royco.