MariettaSirleaf[1](bornApril12,1970),betterknownsimplyasRetta,isanAmericanstand-upcomedianandactress.SheismainlyknownforherroleasDonnaMeagleonNBC'sParksandRecreation.Shehasappearedinseveralfilmsandtelevisionshows,andhasperformedstand-uponComedyCentral'sPremiumBlend.ShecurrentlystarsasBarbarainBravo'sGirlfriends'GuidetoDivorce.