Typically with many Indian weddings, there is a break between the ceremony and reception so that people can change if they'd like to. The custom amongst a lot of modern Indian families is to wear traditional Indian outfits for the former and Western outfits for the latter. Men tend to make this cultural switch more often than women, though women will often change to a different sari for the evening.

That being said, please do whatever you feel comfortable with! If you have multiple appropriate outfits then feel free to wear them. You can also stay in the same outfit the entire day. The choice is yours - we're just happy you're here to celebrate with us.