Facebook will now allow you to start cross-app group chats between Messenger and Instagram, the company said Thursday. The update is a big step forward in Facebook’s ambitions to make its apps work better with each other. In order to use cross-app communications, you’ll need to sign up, and Facebook says that “over 70% of eligible people on Instagram have updated the new Messenger experience.”

The company is bringing other new features to messaging applications in addition to cross-app group messaging. The polls will be available in group DMs on Instagram and in cross-app chats so you can, for example, vote on where to have lunch. Facebook has added group typing indicators to Messenger, so you can see when multiple people are composing a message. (It’s not clear from the Facebook blog if group input metrics are coming to Instagram as well, but I asked the company to clarify that.) And you can now use the Look Together feature of Facebook to watch videos from your Instagram feed with your friends.

Facebook is also adding new chat themes to Messenger, including a “cottagecore” theme, inspired by J Balvin’s latest album, and an astrology theme.