While Simi was 17 years of age, she had her first romantic love affair with then Maharaja of Jamnagar. They were neighbors while they were residing in England. In the early 1980s, she was in love with Salmaan Taseer. They dated each other as a boyfriend and girlfriend for several years. Simi was once married to Ravi Mohan, but this married life ended in divorce within few months. She is 5.7 ft. of height. Her nationality is Indian and she is of mixed Indian ethnicity.
Though Simi was born in Ludhiana, Punjab, India and grew up in England. There she enrolled at Newland House School. During her early teens, she moved to India and since then she has been active in Indian film industry. She made her acting debut in 1962 by starring the role of Kamal in the movie Raaz Ki Baat.
In the same year, she appeared in movies Son of India and Tarzan Goes to India. In 1965, she starred in movies like Teen Devian and Johar-Mehmood in Goa. She got her rise to fame in the mid-1960s after she portrayed the role of Dr. Anjali in a Hindi film Do Badan.
She is also critically acclaimed for starring the role of Rajini in a Hindi Romantic drama film Saathi. In 1985, she worked in the TV show Living Legend Raj Kapoor as its writer and director. She is also popular for as the host of her own show Rendezvous with Simi Garewal.
She is one of the greatest actresses of her time, always appreciated for her performances and featured in over 45 movies (including TV series). She is well known for her roles in movies and TV series like Saathi, Karx, Do Badan, Siddhartha, Izhaar, Rukhsat, etc. She is presently busy with her upcoming work in Koochie Koochie Hota Hai, giving voice.
She is among the richest Indian actress ever, whose net worth is estimated at $100 million and her salary per episode is about IRs1 million. She resides in one of the expensive places in Mumbai; her present address is Pavlova, 6th Floor Little Gibbs Road Marbar Hill, Mumbai 400006. As her family is a Royal family, she is living a luxurious life.