Complex sentence: She is best known for playing Buffy Summers in the 1992 film "Buffy the Vampire Slayer", she also played Catherine "Cathy" Dollanganger in the movie version of the V.C. Andrews book "Flowers in the Attic".
Split into simpler sentences: She is best known for playing Buffy Summers in the 1992 film "Buffy the Vampire Slayer". She also played Catherine "Cathy" Dollanganger in the movie version of the V.C. Andrews book "Flowers in the Attic".