The 41-year-old Princess of Wales appeared at the charity Streets of Growth in east London.
She chose a white top and a Roland Mouret suit for the exit, which cost 750 pounds sterling (90 thousand rubles).
She combined it with a blazer and flared pants. Kate Middleton completed her look with pointed toe stiletto heels.
The Princess of Wales' makeup was restrained and her hair was styled with curly curls.
Online users noticed that Middleton's image is very similar to the outfit of the late Princess Diana. She appeared in a similar costume in June 1997 in New York.
Kate has repeated Lady Diana's style many times already. She also wears her engagement ring.