One of the world’s hottest apps right is about to get bigger.

Tik Tok -- the popular short video platform where teens in Asia post clips of themselves dancing to hit tunes and performing viral stunts -- is merging with its Western equivalent Musical.ly, according to their owner -- China’s Bytedance.

A source familiar with the matter tells the South China Morning Post that the move is part of a reorganization effort to “create better synergies,” taking advantage of the two apps’ many similarities.

The merger means Tik Tok’s users in Asia and Musical.ly’s users in the US and Europe can now see content created by each other -- but, notably, not users in China.