The England goalkeeper reached the milestone in Sunday's FA Women's Super League trip to Chelsea - just her third appearance of the 2021/22 campaign, having returned from a calf injury at the end of January.
A brave, committed shot-stopper with excellent distribution, Roebuck has earned a reputation as one of the world's brightest young goalkeepers.
The 22-year-old has already earned recognition on the international stage with a nomination for FIFA's The Best Women's Goalkeeper, shortlisted in a star-studded line-up alongside Ann-Katrin Berger, Sarah Bouhaddi, Christiane Endler, Hedvig Lindahl and Alyssa Naeher in 2020.
Since joining City in 2015 as a teenager from childhood club Sheffield United's Centre of Excellence, she made her debut as a substitute in the final league game of our 2016 double-winning season and has helped the Club to three Women's FA Cups and a Continental Cup since.
She signed her first professional deal in January 2018 and extended her stay in February last year, having claimed the inaugural FA WSL Golden Glove award with a string of impressive displays in which she conceded just nine goals in 16 games, preserving ten clean sheets.
Now also a fully-fledged England international, she is a regular between the Lionesses' sticks and became an Olympian at the 2020 Games in Tokyo as part of Team GB's squad.
It is fitting she should make her 100th appearance in a trip to Chelsea, having carved a name for herself with an unforgettable display on a previous visit to Kingsmeadow, deputising from the bench due to an early injury to Karen Bardsley and producing a colossal performance to deny the hosts and earn a valuable 0-0 draw.
Determined to become the best, Roebuck has been tipped to achieve great things for Club and country - this merely her latest achievement in an already-impressive career.
Many congratulations, Ellie!