Idina Menzel is letting the world in on a major mom fail.

The “Frozen” star, 47, chronicled a mom moment between her and her son, 9-year-old Walker on Twitter.

“The tooth fairy didn’t show up last night,” she revealed. “Mom put the tooth in tissue and son hid it under the pillow. Then mom fell asleep and woke up this morning to son with tears.”

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She added, “That tooth fairy better get her s**t together,” before jokingly labelling herself a “#BadMom.”

Broadway friend Rachel Bay Jones replied to Menzel’s tweet offering a slick solution, “Been there,” she wrote. “Look under the bed.”

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Menzel shares Walker with “Rent” co-star/ex-husband Taye Diggs.

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