AFLW champion Erin Phillips will wear her father Greg's No.22 at Port Adelaide, having officially committed to the expansion club.

Greg played 343 games for Port Adelaide between 1976-1993 (which included a stint at Collingwood), winning eight premierships and captaining the club along the way.

"I've chosen to wear No.22, clearly it's because of Charlie Dixon," Phillips said with a laugh.

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"Obviously that number is really special to me, and it'll be a real honour to wear it after Dad wore it for this club. I thought about the No.13, but that belongs to the Adelaide Crows, and that's something I want to leave there and have tied to the history there.

"I think he said he's better looking in it, he's so proud and it'll be good to see Dad back up in the stands in the Port colours again. He's just proud no matter what I decided."

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Port Adelaide head of AFLW Juliet Haslam said the contract offered to Phillips was multi-faceted, with Phillips adding she had not settled on coaching and was keen to learn about other areas of the club.

"[It's] certainly a longer-term agreement, because we'd like to have Erin involved in the club beyond her playing career," Haslam said.

"As long as she can play, we'd love to have her playing, but certainly we'd love to have her involved in the club beyond her playing career too."

Phillips said the long-awaited decision was something she settled on just this week.

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"Honestly, it was probably Sunday morning. I've been waking up a lot of mornings thinking should I, shouldn't I, I've had so many great conversations with people in my life, midnight calls with my dad on night shift, and just that morning, it felt right," Phillips said.

"It's something I'm really excited about, and it's literally a dream come true to finally have this opportunity, which is something I've wanted my whole life.

"I feel good in the fact I feel like I've left the Adelaide football club in a fantastic space. I expect great success for them in the future and there are friendships there that I'm going to have for a lifetime.

"Although it was really difficult having that chat with Matthew Clarke, Phil Harper, Chelsea (Randall) – I did feel good that I've been able to contribute to that club and give it all I have in the six years."

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Phillips said she hadn't talked to her Adelaide teammates about their future plans and whether it involved crossing to the arch-rivals, but hinted there may be some chats in the future now her move is official.

"It's going to be fantastic to have the first ever AFLW Showdown with the Crows and Port, and it's something I'm really excited to be involved in. I know even the girls at the Crows will be excited. It'll be a great rivalry and the very first one will be really special," she said.

"My dad's legacy here is incredible, but I want to make my own legacy here at the club. It's exciting to be part of the first Port Adelaide women's side, and I want to contribute as much as I can on the field and off the field to help this team achieve success.

"I'll do whatever it takes, same as what I did at the Adelaide football club, put all my energy into what's probably going to be a really young Port Adelaide side with fantastic South Australian talent here and help them achieve their goals and become professional athletes."