Complex sentence: Their nuptials get interrupted when Tom's best friend Alex Eilhauer (Chris Pratt) gets Violet's sister Suzie (Alison Brie) pregnant at Tom and Violet's engagement party and the two marry before Tom and Violet.
Split into simpler sentences: Their nuptials get interrupted when Tom's best friend Alex Eilhauer (Chris Pratt) gets Violet's sister Suzie (Alison Brie) pregnant. At Tom and Violet's engagement party and the two marry before Tom and Violet.