She joins brother Min Woo Lee, who was part of the inaugural men's TGL competition launched by Tiger Woods and Rory McIlroy last year.
The world No.7 was one of six players announced on Tuesday taking the roster to 14, including five of the world's top ten, among them New Zealand's Lydia Ko.
World No.1 Nelly Korda, who earlier this year said creating a female-only edition represented a missed opportunity to have men and women in the same competition, remains unsigned.
The event features players competing in a custom-built, high tech arena in Florida, including a 20 x 14 metre simulator.
The other new players for WTGL, which is slated to start later this year, are major champions Celine Boutier and Danielle Kang; world No. 24 Andrea Lee; Megan Khang, a four-time member of the US Solheim Cup team, and three-times Swiss Olympian Albane Valenzuela.
They join Ko, Jeeno Thitikul, Charley Hull, Brooke Henderson, Lexi Thompson and Michelle Wie West, Lottie Woad and Rosie Zhang.
"WTGL continues to build momentum as a global platform for LPGA stars and women's team golf," said Pete Jung, chief marketing officer of TMRW Sports, which partnered with the LPGA on the creation of the league.
Adam Scott is the other Australian in the men's event.
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