"Yay! So excited! This is going to be an amazing trip!" tweeted Hilton after she reached the Chhatrapati Shivaji International Airport.
Paris is in India to launch her the Fall-Winter designs of her handbags.
"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 at JW Marriot hotel, Mumbai and is expected to address the media later today.
Paris is also expected to meet Bollywood celebrities at a party organised by socialite Queenie Singh for her.