Port Adelaide have secured the futures of midfielder Sam Powell-Pepper and ruckman Billy Frampton with new contract extensions.

Powell-Pepper has signed a new two-year extension that will see him remain at the Power until at least the end of the 2020 season, while Frampton's new two-year deal will see him stay at Alberton until at least the end of 2019.

After being selected with pick 18 in last year's National Draft, Powell-Pepper instantly imposed himself on the AFL, gaining a Rising Star nomination in his debut game.

The midfielder has played in every match for the Power this season, and is averaging 17.4 disposals and 3.5 clearances a game.

“I’m really thrilled, I love the club and everyone here. I’m just stoked to be here for another two years on top of my current contract,” Powell-Pepper told the club's website.

“I was pretty thrilled to get the [Rising Star] nomination. It’s been a fairy tale start to play every game and be injury free; I couldn’t ask for much more.

“Working with the mids like Ollie (Oliver Wines), Ebo (Brad Ebert) and Chaddy (Chad Wingard) to give Robbie (Robbie Gray) a chop-out up forward has been great.

“I’m looking forward to working on a few things with my game with Michael Voss, like defensive running. In the meantime I’m just getting the hang of playing AFL footy and having fun along the way.”

Although yet to make his debut, Frampton has been in the Power's system for three seasons now, after being selected with pick 84 in the 2014 National Draft.

Frampton's career has been hampered with several injury problems, although Port Adelaide General Manager of Football Chris Davies believes a senior debut isn't too far away.

“It’s amazing the difference continuity of training can make, particularly for a developing big man,” Davies told portadelaidefc.com.au.

“Billy is a big, strong, aggressive ruckman who loves the contest.

“He hasn’t broken through for a senior game yet but his hunger to learn and improve shows he has a bright future with us.”