Simplify the following text for a Grade 11 native English-speaking person.
Original: In 1910 , he promoted Florence Lawrence , formerly known as `` The Biograph Girl , '' and actor King Baggot , in what may be the first instance of a studio using stars in its marketing .
Simplified: In 1910 , he actively promoted Florence Lawrence , then known as the `` Biograph girl '' , in what may be the first instance of a studio using a film star in its marketing .