Janet Stewart, Lady Fleming (17 July 1502 – 20 February 1562), called la Belle Écossaise (French for 'the Beautiful Scotswoman'), was a Scottish courtier.

[2] Janet's parents were distantly related (precisely, half second cousins once removed) by a common ancestor: Joan Beaufort, Queen of Scots.

The following year, presumably due to her unofficial membership in the royal Stewart family, the widow Fleming was appointed governess or nurse to her infant half-niece Mary, Queen of Scots (her new mistress having been fathered by her late half-brother).

[5] Giovanni Ferrerio wrote to Robert Reid, Bishop of Orkney, concerned about Lady Fleming's lack of French or Latin.

Their affair resulted in pregnancy, and—either before or after bearing the French monarch an illegitimate son—Janet was sent back to Scotland and replaced as governess to Mary by Françoise de Paroy.

The ladies were not at first given mourning clothes, and Janet quoted in Latin a phrase from the Book of Joel to the English diplomat Thomas Randolph, "Scindite corda vestra, non vestimenta," Rend your heart, not your garments.