Meghan Markle and Prince Harry did invite Prince William and Kate Middleton to Lilibet's birthday party.
According to sources, there is a legitimate reason why Prince Williams and Kate Middleton were not in attendance for the special occasion.
The Cambridges and their three children, George, 8, Charlotte, 7, and Louis, 4, were reportedly invited to spend time with the Sussexes to celebrate their daughter's first year.