Some people say no, because they avoid as many chemicals as they possibly can during pregnancy, so it really depend on your personal philosophies.

Some salons are reluctant to spray tan during pregnancy too, so you might just want to double check that.

Another thing to consider is that your skin is stretching, so it might not look great for long, but if it's for a special occasion and then you're not too fussed after that, that's okay then! Have fun at the wedding.