The 28-year-old midfielder has admitted that the lure of working with one of his former bosses was a key factor in his decision to swap the Premiership for the Championship.
“Having the chance to link up with Sam again is a massive thing and obviously coming to such a massive club is great for me,” Nolan told the official site.
“I’m very sad to leave Newcastle but I’m coming to another massive club in my eyes and hopefully I can start off and be as successful as I was there.”
Nolan rejected the offer of an improved contract at Newcastle to come to West Ham after the club made it clear that he was the man they wanted to spear-head their promotion campaign.
“The be all and end all was that the club actually wanted me and the owners put faith in me and have given me a security of contract. Now it’s my time to repay them and hopefully I will do that.”