This article first appeared on RTL.de.

On his Instagram channel, the "little" brother and replacement driver from Mercedes congratulates his sister Gina on her birthday, writing: "Happy birthday to the best sister in the world. I'm proud of you!"

He also publishes numerous pictures of Gina, who became European Youth Champion in western riding in 2013. Gina Schumacher celebrated her 26th birthday on Monday - and of course a well-wisher should not be missing: brother and Formula 1 driver Mick.

Especially sweet and touching: In the first picture, Gina is wearing a Mercedes T-shirt from dad and Formula 1 record world champion Michael Schumacher.

At the latest after Michael's serious skiing accident in 2013 (cranial brain trauma), the two support each other a lot. Gina has been visiting Mick regularly at the race track for the last two years - Mick watches her competitions.

Of course, birthday wishes should not be missing...