In total, he has made 13 appearances in an Ospreys shirt to date, eleven of them starts, showing his eye for an opportunity with four tries to his name already. Capped by Wales at age-grade level, he has also experienced the senior international environment having been included in an extended squad for the 2010 Six Nations.
Speaking after putting pen to paper on his new deal, Phillips said: "It's great news for me, I'm really pleased that I'm going to be able to continue my rugby development here for the next two years. It's a commitment from me to my home region, and it's good to see the commitment from the Ospreys coaches who are putting their faith in me to continue improving.
"It's my third full season in this set-up and things have been going really well for me. I've got another two years here and I'll still only be 22 by then, and hopefully, I'll be really pushing to get in that wingers jersey."
Ospreys Head Coach, Sean Holley, commented: "It's good news for Kristian and for the Ospreys that he's renewed. He's a product of the region, and a prodigious youngster who has unfortunately suffered with injury during his short career so far, but he has put that behind him and fronted up to the challenge of developing himself as an Osprey.
"His attitude and his performances in both the Premiership and the LV= Cup this year have warranted a new two-year deal. He has real pace and a wicked sidestep, as well as an eye for the try-line, and he has a good scoring record for every team he has represented.
"He is continuing to develop his all-round game by working extremely hard. After some personal setbacks he is beginning to mature and we expect him to continue showing a positive attitude and continue to grow as a player over the next two years."