Au courant and In the know of

Au courant adjective - Keenly aware of and responsive to the latest developments especially in fashion and entertainment.

In the know of and au courant are semantically related. In some cases you can use "In the know of" instead an adjective phrase "Au courant".

Au courant and in the know of are semantically related. Sometimes you can replace phrase "Au courant" with "In the know of", this phrases are similar.