there are several popular online retailers that specialize in Indian bridal wear and have a wide selection of designer lehengas, such as:
Utsav Fashion
Aza Fashions
Kalki Fashion
Sabyasachi Mukherjee
Anita Dongre
Manish Malhotra
It is important to note that the "best" seller may vary depending on personal preferences, budget, and availability. It is recommended to do some research, read reviews, and compare prices before making a purchase