Salman Khan, who is hosting the show for the fourth consecutive season, threw open the doors of the house and welcomed the guests.
Based on the theme of 'hell' and 'heaven', the house has been divided into two parts. It's separated by a wired mesh and like its name the hell side is low on comfort level.
It was Tanishaa Mukherjee who entered the house first. Guess what? Her mother, yesteryear actress Tanuja, and sister, Bollywood star Kajol were there to introduce her.
VJ Andy followed her and as expected he sauntered in his signature style dressed in shorts and blazer.
Tanishaa and Andy, who took the heaven side of the house, were given the task to allot heaven or hell to other inmates.
Dancing to the beats of "Jhallah wallah" and "Duniya mein logon ko" actress Gauhar Khan entered the "Bigg Boss" house and close on her heels was screen actress Ratan Rajput. While Gauhar was sent to heaven, Ratan was allotted hell.
Next up was celebrity couple Shilpa and Apoorva Agnihotri. They might be husband and wife in real life, but in the show they were separated as Shilpa was sent to heaven, while Apoorva to hell.
Then came "Bodyguard" fame, British-Indian actress Hazel Keech and TV actress Kamya Punjabi. Both were sent to hell side of the house.
Kushal Tondon and Rajat Rawail were the next and while the former was given hell, the latter was lucky to enjoy the heaven.
Newcomer Elli Avaram, who is a part of upcoming film "Mickey Virus", was the next contestant and she was sent to hell.
When Indian wrestler Sangram Singh entered the "Bigg Boss" house, Tanisha and Andy decided to send him to heaven because of his achievements.
"Balika Vadhu" fame actress Pratyusha Banerjee and actor Armaan Kohli were sent to hell side of the "Bigg Boss" house.
Anita Advani, who claims to be late superstar Rajesh Khanna's live-in partner, was the last contestant and she was allotted heaven.
This year "Bigg Boss" house has been erected in Lonavala and contestants will be locked inside for 105 days.
As many as 74 cameras will follow them 24X7.
"Bigg Boss - Saath 7" will air every night at 9 p.m. on Colors channel.
In terms of glamour, Akshay Kumar came to promote his upcoming film "Boss". Comedian Kapil Sharma too joined Salman on the show for an act and he entertained along with Upasana Singh Ali Asgar, who are seen as his aunt and grandma in "Comedy Nights With Kapil".