Sarah Jessica Parker and Matthew Broderick Ride the NYC Subway With Andy Cohen -- and No One Noticed!

Field trip time!

Sarah Jessica Parker and her husband Matthew Broderick stepped out on Thursday to attend the opening night of Broadway’s Hello, Dolly! with Andy Cohen -- and to their sweet surprise they went unnoticed!

“C train to the opening of Hello Dolly! AND I CAN'T WAIT! #GayChristmas,” the Watch What Happens Live host captioned his Instagram post, showing how no one on the train noticed them.

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Parker also took to Instagram to document the night, sharing a funny video of Cohen and Broderick dancing while waiting for the train.

“Act 1,” the Divorce star captioned the cute snap.

WATCH: Naomi Watts Hilariously Sneaks a Photo of a Fan Snapping Her on NYC Subway -- See the Pics!

But, not all celebrities go unnoticed. See how Naomi Watts cleverly reacted when she caught a fan taking pictures of her in the video below.