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.
CITY+ | SUBSCRIBE TO ACCESS EXCLUSIVE CONTENT
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!