Kate Middleton, Prince William, and Prince Harry all turned out Sunday to support the runners during the London Marathon.

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According to People, the royals' Heads Together campaign for mental health is the official charity of the race, and as we all know, they absolutely love getting the word out about the campaign (which, for the record, is a wonderful and important one).

They began their day at the starting line to kick things off, but they didn't go home from there. Instead, they stuck around to cheer runner on throughout the day.

Runners got a treat at Mile 22, where Kate was on hand to pass out bottles of water.

We would almost consider running a marathon if it meant we could get a bottle of water from Kate Middleton. Almost.

From: ELLE US