Lachlan Gillespie (born 23 October 1985) is an Australian children's entertainer, singer, musician, and actor.

Gillespie began playing the piano at the age of four, and started formal singing training when he was 12.

In May 2012, it was announced that Gillespie would replace founding member Jeff Fatt as the Purple Wiggle at the beginning of the following year.

[3][4] In 2018, Gillespie, along with fellow Wiggles member Anthony Field, Emma Watkins and band members Oliver Brian and David O'Reilly, started a band for adult fans called the Unusual Commoners, which played a mixture of traditional Australian, Irish, Scottish and folk songs.

[8] On 9 April 2020, ballet dancer Dana Stephensen proposed to Gillespie after meeting on the set of the Wiggles in December 2018.