By Breaking Celebrity News Staff

Top Chef host Padma Lakshmi is mourning the death of her longtime lover, Theodore Forstmann, who passed away from brain cancer on Sunday at the age of 71, Breaking Celebrity News has learned.

The billionaire businessman was the head of sports and modeling at talent agency IMG, he was recently ranked No. 242 among America's 400 Richest and is worth an estimated $1.8 billion, the International Business Journal reported.

Lakshmi and Forstmann have been dating for several years but kept their low-profile relationship private until the former model gave birth last year.

The arrival of one-year-old daughter Krishna in February 2010 led to speculation over who the father was, and it