Tom Wood and Teimana Harrison are among a group of six Saints players who have signed new contracts at Franklin’s Gardens.
Paul Hill, Jamie Gibson, Ben Nutley and Adam Parkins have also committed their future to the club.
Wood has become a key member of the Saints squad since joining from Worcester Warriors in 2010 and the 29-year-old was recently handed the role of club captain for the season ahead.
Current players’ and supporters’ player of the year Harrison and tighthead prop Hill are two of England’s brightest prospects, with both having broken into the national side last season.
Gibson became a key member of the Saints starting 15 after joining from Leicester Tigers during the summer of 2015, while Nutley enjoyed a fine end to the previous campaign.
And Parkins will provide valuable cover at prop during what will be another busy season at the Gardens.
Director of rugby Jim Mallinder is happy to have got the deals done before the season begins in September.
And he said: “We’re delighted that all six players have signed new contracts to stay at Franklin’s Gardens.
“We’ve seen them all develop massively in their time at the club and to have these deals agreed well before the start of the 2016/17 season means that we can plan with certainty for the future.”
Wood is looking forward to continuing his stay at the Saints, having racked up 129 appearances for the club.
And he said: “The Saints is a great place to be and I’m delighted to have signed a new contract.
“We’ve got some quality players here and I’m looking forward to leading the team.”