Royal tours are hard work!

A sleepy Prince George and Princess Charlotte arrived in Berlin Wednesday morning — bringing with them even more adorable royal sibling moments.

George, who turns 4 on July 22, looked like he was ready for a royal nap as he hit the tarmac at the Berlin Tegel Airport with dad Prince William, mom Princess Kate and little sister, Charlotte.

The little prince rubbed his eyes and held William’s hand as they made their way through the greeting line.

KARWAI TANG/WIREIMAGE; CHRIS JACKSON/GETTY

George looked ready for business in his short-sleeved button-up, go-to shorts and belt. He has also officially put his knee socks away in exchange for more grown-up ankle socks.

KARWAI TANG/WIREIMAGE

OMAR MARQUES/ANADOLU AGENCY/GETTY

Two-year-old Charlotte — in a blue floral dress and matching shoes — quickly perked up when she was handed a mini bouquet to match mom. She happily smelled her flowers. Charlotte is a pro at handling a bouquet — she had plenty of practice as an adorable bridesmaid at aunt Pippa Middleton’s wedding in May.

JANE BARLOW/PA

Read more about the royals’ Berlin arrival and see more adorable photos on People