"Yay! So excited! This is going to be an amazing trip!" Hilton tweeted after stepping into the Chhatrapati Shivaji International Airport here.
The heiress, who is in India to launch the Fall-Winter designs of her handbags, sported a blue jumpsuit when she arrived, amid a flutter of shutterbugs.
"Wow! What a warm welcome into Mumbai. Hundreds of fans and media waiting for me when I landed... I love you India!" she added.
Hilton is staying in Mumbai's JW Marriot hotel and is scheduled to address the media later Saturday. She is expected to meet many celebrities and Bollywood actors at a party organised for her by socialite Queenie Singh Saturday night.