Miss Lark is a minor character in Mary Poppins and its sequel. She's an elegant woman who has a dog named Andrew. At the beginning of the original film, Bert mentions that "Miss Lark likes to walk in the park with Andrew," which shows the reason for her presence there during his musical performance as a one-man band.
Behind the scenes
Sudha Bhuchar made her Disney feature film debut as Miss Lark in Mary Poppins Returns. As a Tanzanian-born British Asian actor, playwright, and cofounder of the Tamasha Theatre Company, she is best known for writing numerous screenplays in television and film.
Role in the films
Miss Lark is seen watching Bert's performance. As he approaches her, he gazes upon Andrew before he continues performing in front of everyone just as they leave after his good performance. They witness a strong wind across Cherry Tree Lane just as George and Michael notice Mary Poppins arriving on the street. She isn't seen again for the rest of the film afterward.
Mary Poppins Returns
Miss Lark appears briefly appears during the part where Annabel, Georgie, and John hang out at the park just as Georgie mingles with her pet dog, Willoughby, while he sees a balloon lady from a distance. She later appears when Willoughby goes after the runaway kite that Michael used to own. Furthermore, she appears during the part where everything else is being packed up just as she says goodbye to Willoughby. She later appears during the musical number "Nowhere to Go But Up" alongside Willoughby while they float via balloon.