10/08/2012 05:45 pm ET

Henry Driver Photo: Minnie Driver's 4-Year-Old Son Sports A Mustache For 'Movember'

Minnie Driver sure has a funny one on her hands.

The actress posted a photo of her 4-year-old son, Henry, wearing a fake mustache on Instagram, writing, "Early Movember."

Movember, if you don't know, is an annual, month-long event in which men grow mustaches during the month of November to raise awareness of prostate cancer and other male cancer initiatives. Although Henry can't grow his own facial hair yet, he sure does know how to help a charitable cause.

So, will Minnie add any more cute, curly-haired kids to her brood? "I couldn't do two as a single mom, I really couldn't," she recently said, adding, "it would be too much."

Check out pictures of Henry below:

henry driver photo

henry driver photo

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