The princess canceled plans to attend the horse racing event on Wednesday as she tries to find the “right balance” in her recovery from cancer, Kensington Palace said.

Royal Ascot was the ideal fashion showcase for Princess Diana. The late royal, who died in 1997, was able to turn the pavement on the way to the racing event into her own personal runway, fashioning bold colors, patterns and more when she attended the annual royal event.

The Princess of Wales has pulled out from a planned attendance at Royal Ascot. Catherine, who is making a gradual return to public life after her cancer diagnosis last year, is trying to find the right balance as she fully returns to public engagements, according to royal sources.