last laugh

Translations
последний смеется тот, кто смеется последним
After years of hard work, she finally had the last laugh when her business became a huge success.
После многих лет упорного труда она наконец посмеялась последней, когда ее бизнес стал невероятно успешным.
Definitions
The phrase 'last laugh' refers to ultimately achieving success or vindication after being doubted, mocked, or underestimated by others. It often implies that someone who was initially ridiculed or dismissed ends up in a better position than those who laughed at them.