Leeds forward Amy Woodruff counts herself among the legions of Leah Williamson's "massive fans", but she will soon become one of few able to boast they played against the England captain.

After discovering her step four National League side would be taking on Women's Super League side Arsenal in the fourth round of the FA Cup, Woodruff took to Twitter to express her delight.

"I'm gonna play against Leah Williamson wtf, I've already won no matter (the) result," Woodruff posted and that viral tweet, which now has over a quarter of a million views, began a heart-warming exchange with the Lionesses skipper set to culminate in the two women exchanging shirts after their Sunday afternoon cup clash.

"I looked at the Arsenal squad, I obviously knew Leah played anyway," Woodruff told PA.

"But I was reading some of the names and thinking 'there's no way I'm playing against these. I've dreamed of stuff like this, and I'm sure young girls, younger than me have dreamed about stuff like this, and I can't believe that I'm now going to be one of them. My dream is going to be happening'.

"I'm a big fan of Leah. I think she's so down to earth, she's such a lovely person. She joins in with the community with Arsenal a lot and she has a million fans of young girls who just want to be Leah. And I'm one of them. I'll openly admit I'm one of Leah's massive fans."

So much so, in fact, that Woodruff tweeted Williamson: "Pls can I have your shirt after (the) game" and was stunned when her idol replied: "Can we swap? See you on the 29th."

Woodruff and her team-mates train two nights per week while balancing full-time careers and commitments. Her squad boasts nurses, teachers, students and several players working across the emergency services.

Arsenal's professional line-up, in contrast, reads like a who's who of international football, despite household names Beth Mead and Vivianne Miedema being sidelined with long-term ACL injuries.

Leeds could still line up against Lioness Lotte Wubben-Moy as well as Sweden international Stina Blackstenius, who has six goals and four assists in 16 appearances across all competitions this season, and are doing their best to take it all in their stride after beating Stoke from one step up the pyramid.

Woodruff's granddad will be one of the many Phoenix faithful taking a coach to London on Sunday ahead of what she readily acknowledged is 'obviously the biggest game of our lives'.

"Leah being the captain, and to play against the captain of England when we're just normal girls from Leeds to be playing against them I just can't get over it. I honestly can't get over it," she said.

"We've been watching them on telly all these years. Psychologically we're going to have to not get too excited seeing them in person, sharing the same pitch, but remember why we are here and that we have won games to get into this position and how grateful we are.

"You never know what could happen in an FA Cup and we're going to give it our all. We've got a lot of people following us, so we want to make them proud of us, proud of ourselves."

Regardless of the result, should Williamson make good on the shirt swap, Woodruff knows precisely where the prized souvenir is heading, adding: "I just bought my first house. I get the keys a week today. So that's going up framed on my wall."