The shared Instagram account for Kate Middleton and Prince William welcomed a trio of guest posters Sunday, when children Prince George, Princess Charlotte, and Prince Louis took the platform over. The occasion: Father's Day, with a post in tribute to their dad, the Prince of Wales.

And unlike last year, this time around, Kate Middleton was there to support husband Prince William as he took part in the celebration. Though Middleton missed out last year while she was undergoing chemotherapy,