Lily Marie Louise Carlstedt, later Kelsby (March 5, 1926 – June 14, 2002), was a Danish athlete who competed mainly in javelin throwing.

Olympic medal record
Women's athletics
Representing  Denmark
	1948 London	Javelin throw

She competed for Denmark in the 1948 Summer Olympics held in London, where she won a bronze medal in javelin and in the 1952 Summer Olympics held in Helsinki, where she beat the Olympic Record.