Tis the season for royal cheer! Prince William, Princess Kate and Prince Harry celebrated one of their favorite causes on Monday with a festive charity party.
The trio dropped by a gathering of volunteers from their Heads Together initiative, the mental health campaign they kicked off in the spring. Kate brought stylish Christmas spirit with a red-and-green Vanessa Seward dress (currently on sale for $623) cinched with a black belt and $185 fern hoop earrings from London designer Catherine Zoraida.
Meanwhile, William told a deejay at the party that 3-year-old Prince George and 19-month-old Princess Charlotte are a little excited for the holidays.
“He said the kids are really looking forward to Christmas and George is already ripping open his presents,” London radio host A. J. King, an ambassador for the Prince’s Trust, tells PEOPLE.
William happily said this was the last week of work for the royals.
“They’re looking forward to downtime and a chill with the family.”
The party was hosted by youth support service The Mix to celebrate the volunteers and counselors who support people through tough times in their lives. But they also invited charity partners from Heads Together, enabling them to catch up with some of those who have been working to increase awareness and spark the conversation this year.