2020: two-year-old season

Joan of Arc began her racing career in a maiden race over seven furlongs on the synthetic Polytrack surface at Dundalk Racecourse on 6 November when she was ridden by Seamie Heffernan and started the 11/10 favourite. After being restrained in the early stages she stayed on well and overtook the front-running outsider Zara Mac 100 metres from the finish, only to be caught on the line and beaten a nose by the Donnacha O'Brien-trained Hazel.^[5]

2021: three-year-old season

Ryan Moore partnered Joan of Arc when the filly began her second campaign in a seven furlong maiden for fillies and mares of all ages on soft to heavy ground at the Curragh on 21 March. Starting the 4/6 favourite in a twenty-runner field she took the lead two furlongs out and won by one and a quarter lengths from Approach The Dawn.^[6] Three weeks later the filly was stepped up in class for the Group 3 1,000 Guineas Trial Stakes at Leopardstown Racecourse and started at 7/1 in a fifteen-runner field. Ridden by Wayne Lordan she recovered from a poor start to dispute the lead a furlong from the finish but tired badly in the closing stages and came home sixth behind the 80/1 outsider Keeper of Time. Ryan Moore resumed his association with the filly when she started 11/4 favourite for the Irish 1,000 Guineas Trial over one mile at Leopardstown on 9 May. She led for most of the way and turned back a sustained challenge from the Henry de Bromhead-trained outsider Flirting Bridge to win by one and three quarter lengths.^[7] After the race O'Brien said "She won making the running the first day of the season and last time the pace was a little bit too fast up front, so we thought she'd leave that run behind her. She'd been working lovely and the plan was always to come here and then the Irish Guineas. She's a relaxed filly and nice and balanced and bowled along into that headwind which wasn't easy. She galloped home very well she'll have no problem going up to a mile and a quarter."^[8]

At the Curragh on 23 May, with Moore in the saddle Joan of Arc started the 9/2 third favourite for the 99th running of the Irish 1000 Guineas over one mile on heavy ground. She tracked the front-running No Speak Alexander and gained the advantage inside the final furlong but was caught on the line and beaten a short head by her less fancied stablemate Empress Josephine.^[9] On 20 June Joan of Arc was sent to France and moved up in distance to contest the Prix de Diane over 2100 metres at Chantilly Racecourse in which she was ridden by Ioritz Mendizabal and went off the 5.3/1 third choice in the betting. The Prix Penelope winner Philomene started favourite while the other fifteen runners included Coeursamba, Incarville, Noble Heidi (Preis der Winterkonigin), Cirona (Prix de la Grotte), Rumi (Prix Vanteaux), Harajuku (Prix Cleopatre) and Rougir (Prix des Reservoirs). After settling in second place behind Sibila Spain, Joan of Arc made steady progress in the straight, took the lead 50 metres from the finish, and won by three quarters of a length from Philomene with Burgarita, Sibila Spain, Rougir and Harajuku close behind.^[10] O'Brien, who was winning the race for the first time, said "Ioritz was really impressed with her and he thought a mile and a half was going to be no problem. He said she only got going with a furlong and a half to go. He said she would love stepping up in trip so it has to be a big possibility... She has progressed with every run. She has a lovely mind, is very well balanced, and has a big, long stride. I suppose what was very exciting about her today, she went through the line very well. As the distance grew she was really opening up."^[11]

At Goodwood Racecourse on 29 July Joan of Arc was matched against older fillies and mares in the Group 1 Nassau Stakes over ten furlongs. Racing for the first time in England she started the 9/4 joint-favourite with Audarya and led for most of the way. She was overtaken approaching the final furlong but rallied in the closing stages and finished a close third behind Lady Bowthorpe and Zeyaadah. In September she returned to France and came home last of the seven runners in the Prix Vermeille at Longchamp, beaten almost fifteen lengths by the winner Teona after being eased down by Mendizabal in the closing stages.^[12] She ended her season in the Prix de l'Opera at the same track on 3 October when she finished tenth to Rougir.