Jane has a hard time saying no because she wants to please everyone. She has been bridesmaid at 27 weddings (most recently at two at the same time). She also has a secret crush on her boss, George. Suddenly, her sister Tess comes home and snare George. And soon there's another wedding to planned, where Jane will be her sister's bridesmaid when she marries Jane's love interest. Meanwhile, Jane is followed by a journalist, Kevin, who writes about weddings even though he has a very cynical attitude towards them. At first he is interested in Jane because she is always the bridesmaid, but the interest changes form over time.
More of a Hollywood than a Seattle movie. Even though it has a few years on it (and it might be good to remember that when you watch it) I think it holds up. It's entertaining and romantic at the same time.