Jessica Keenan Wynn (born Jessica Keenan Armstrong; June 12, 1986) is an American actress, singer, and voice-over artist.

She is known for her roles as Heather Chandler in the off-Broadway production of Heathers: The Musical and Young Tanya in Mamma Mia!

[2] Wynn is the daughter of Edwyna "Wynnie" Wynn and Roger Armstrong.

[3] Her legal surname is Armstrong, but she changed it to carry on the Wynn name.

[1] She is the niece of actor Ned Wynn and screenwriter Tracy Keenan Wynn;[1] the granddaughter of Keenan Wynn, after whom she was named; the great-granddaughter of comedian Ed Wynn; and the great-great-granddaughter of Frank Keenan, all of whom were prominent actors.