Complex sentence: She then rose to prominence with her breakout role in "Sixteen Candles" (1984), becoming a member of the so-called Brat Pack of 1980s teen actors.
Split into simpler sentences: She then rose to prominence with her breakout role in "Sixteen Candles" (1984). Following Sixteen Candles Ringwald became a member of the so-called Brat Pack of 1980s teen actors.