You can wear something that is clearly mature, like a gown with a leg slit, or a lower neckline, but you still have to be tasteful and not overdo it with the sex appeal of your clothing
So, this can be a good option if you're going to multiple events per month, but may not work if you just need a one-off formal dress

Long formal dress Formal dresses, long formal dress, wedding guest dress | gown | formal Gowns | formal dance | formal wedding guest dress | winter formal dresses, spring formal dress , prom | prom dress | prom dresses | formal maxi dresses, formal holiday dresses, long prom dress | Formal maxi, long wedding guest dress, bridesmaids dresses, formal gowns, sorority formal, sorority formal party, formal dress, special occasion maxi, bridesmaid dress, black tie wedding guest, black tie wedding guest dress, wedding guest dresses, formal wedding guest dress, formal maxi dress, special occasion dresses, formal wedding guest dress, lulus,wedding reception , Formal dress, formal dresses, formal gown, black tie wedding guest, Wedding guest dress, outdoor wedding guest dress, cocktail dress, long cocktail dresses, long formal party dress, prom dress | bridesmaid dresses | bridesmaids dresses | prom dresses | long homecoming dress, long wedding guest dress, fancy maxi dress, fancy wedding guest dress, wedding reception dress, formal dance, formal occasion, formal event, homecoming dress, school dance, formal dance, special occasion dress, party dress, formal party dress, dresses for special occasion, spring wedding guest dress, cocktail dress, cocktail party dress, cocktail hour dresses, cocktail dresses, wedding reception dress, party dress, formal party dress, special occasion dress, winter wedding guest dress, gala, fancy dinner, midi dress, organza dress, long dresses, formal dress, gala | formal maxi | formal party, party dresses | Wedding guest dress, wedding reception dress, special occasion dress, party dress, fancy dinner party dress, dresses for special party dresses, cocktail dress, cocktail party dress, cocktail hour dresses, cocktail dresses, wedding reception dress, party dress, winter party dress, date night, special date night dress, wedding guest dress, gala, fancy dinner, midi dress, formal dress, formal dresses, dress, party, LTKGala LTKparties LTKwedding LTKfindsunder100 LTKParties LTKStyleTip LTKFindsUnder100 LTKWedding LTKSeasonal

By sticking with these suggestions, you'll help ensure that your 1950s dresses remain beautiful for many more years
Why brides love it: Ceremony drama + practical warmth