Newcastle have signed up Argentine centre Juan Pablo Socino while Dom Barrow and Scott Wilson have inked two-year extensions at Kingston Park.
25-year-old Socino is to join the Falcons from Rotherham Titans, where he is the leading points scorer in the RFU Championship this campaign.
"It's a dream come true to move to Newcastle Falcons and play in the Aviva Premiership," he told Newcastle's official website about the deal.
"My biggest dream is to get myself in contention for Argentina, and playing for Newcastle will enhance my chances."
Meanwhile, second-row Barrow and tighthead prop Wilson agree new deals, with both having played prominent roles in England U20s' Junior World Cup success of last year. Wilson has continued his international exploits by earning a call-up to the England Saxons squad this season.
"I was grateful to Newcastle when they gave me the chance to play in the Aviva Premiership, and I want to repay the club for the faith they have shown in me," said Barrow.
"Dean has big plans for the club and I want to be playing at the highest level with Newcastle Falcons week in week out."
Wilson said: "I've had a great start to the year, especially with my call-up to the Saxons and I'm enjoying my rugby at the moment."
"There is a lot of competition for a starting place in the front-row, but it's competition that I'm relishing and hopefully I can continue to go from strength-to-strength."