Yes, it is generally considered haram to hang pictures of animate beings on your wall in Islam. Prophet Muhammad (peace and blessings be upon him) strongly forbade hanging such pictures and commanded their removal. However, there are different opinions among scholars. Some allow photographs if they do not glorify a person or expose indecency and are not venerated. Non-three-dimensional pictures for memories, like family photos, are typically discouraged.

And Allah knows best.

Sources:

• IslamQA – Hanging Pictures of Family on the Wall
• IslamQA – Is Keeping Pictures Prohibited in Islam
• AboutIslam – Is Hanging Pictures for a Good Purpose Permissible
• IslamQA – Is it Haram to Have Pictures on Your Wall