"I went vegan, and I've never felt better. Now, I want to share that wonderful feeling with everybody I know," Jacqueline said in a statement.
"Going vegan is the best thing you can do to help stop animal suffering, protect the environment and safeguard your own health, and Lent is the perfect time to start," said the People for Ethical Treatment of Animals (PETA) supporter.
The former Miss Sri Lanka had earlier shot a PETA ad asking Mumbai residents to help put cruel horse-drawn carriages out to pasture.