Rachel Lobangco (born May 15, 1969) is a Filipino actress, model, and performer. She first gained national recognition in 1988 after appearing in a San Miguel Beer television commercial, where she was dubbed the “SiBoom Girl”, inspired by the Apo Hiking Society song featured in the ad. She later became known for her role in the fantasy film Kokak.

In 2011, Lobangco appeared in an episode of Survivor Philippines: Celebrity Doubles Showdown. Aside from acting, she is also a fire dancer and a member of a dragon boat racing team based in Boracay.

Lobangco is the younger sister of Lani Lobangco and the aunt of actor Bruno Gabriel, Lani’s son. In later years, she transitioned from acting to culinary arts and is now known as a Thai chef under the name Khun Lek.

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