Actress Shirley MacLaine is 90 years old and knows the secret to a long life. And apparently she has a secret to longevity, which she shared with Billy Eichner (he recently shared it in a new interview with PEOPLE). [It's the Christmas movie “Noel,” starring Anna Kendrick and Bill Hader. While chatting with the magazine in support of his new film, “Mufasa: The Lion King,” Eichner reflected on working with the film's stellar ensemble, “with that Shirley MacLaine, who gave me the secret to long life.” He reflected on working with the film's stellar ensemble cast.

And according to McClane (via Eichner), the secret is to “put a drop of oil of oregano under your tongue every day.”

The chat, which took place alongside Seth Rogen, the pumbaa to Timon, played by Eichner, immediately asked his costar if he would follow McClane's advice.

Eichner admitted that he had bought it, but had never done it. Now we know what to blame Eichner for if he doesn't live into his 90s.

Many people use oregano oil for beauty and homeopathic care. Zoe Deutch uses oregano oil to combat hormonal acne, and Meghan Markle once tried to get Prince William to drink oregano oil when he was sick. Oregano oil is said to have antioxidant, antifungal, and anti-inflammatory properties and has been used for years in China and in alternative medicine.