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Kate Middleton, Catherine, Duchess of Cambridge

Tim P. Whitby - WPA Pool/Getty Images

Kate Middleton really has a certain glow about her!

The royal mommy-to-be revealed her growing baby bump in a stunning turquoise dress Thursday evening at the National Portrait Gallery in London. There, Prince William's wife met with children who've benefited from The Art Room's charity program.

The Art Room, which counts Kate as a patron, uses art therapy to increase children's self-esteem, self-confidence and independence.

No word yet on whether the brunette beauty dropped by to look at her own official portrait while she was in the building. The semi-stoic painting drew its fair share of criticism, but Kate herself thought it was "brilliant."

And obviously princesses have an eye for these things!

Kate Middleton, Catherine, Duchess of Cambridge

Tim P. Whitby - WPA Pool/Getty Images