Former Cardiff Blues star Allen has been impressive this season scoring five tries in 19 games for Allen Clarkes side.
The 26-year-old’s signature follows hot on the heels of the re-signing of prolific try scorer Luke Morgan who has penned a new two-year deal.
“It’s been a tough couple of months for a few of the boys but ,from the start of the season, I spoke to Clarkie, I spoke to the coaches, and this is where I want to be,” said Allen.
“I’m really thrilled now to get it signed and get it all sorted. It’s been a big year for me, the most games I’ve played in a season, and that’s allowed me to keep doing the little things right, keep working on my game and keep developing.
“Jockey (Matt Sherratt) has been really good at helping me keep on top of that. There are four big games left for us now, we are still in the hunt, and we want to go out and secure that third spot.”
Like his former Wales Sevens colleague Morgan, the Cardiff born centre has agreed a new two-year deal with his current contract due to expire at the end of the season.
Capped by Wales at U18 and U20 level, the former Cardiff Blues man made a huge impression on the sevens circuit and claimed a HSBC Sevens World Series Fans’ Favourite Try of the Year award for his solo effort in the final of the Hong Kong Sevens against Fiji.
Allen has six full Wales caps, the latest coming on the unbeaten tour of the Pacific Nations two summers ago where he worked closely with Matt Sherratt. Having linked up with the Ospreys for the first time off the back of that tour, he won the Guinness man of the match award on his debut at the Liberty on the opening day of the 17/18 season, a 22-13 win over Zebre.
He has six tries from 28 appearances to date.
“Cory has been one of our most consistent performers this season so this new contract is richly deserved,” said Ospreys head coach Clarke.
“He’s had a good run of form and we’ve seen real growth in him as a person, on and off the field.
“It’s clear that there is more to come from Cory, who we believe has the potential to be a really big player for us in the future so this is fantastic news for Ospreys Rugby.”
