Jason Alexander shares poignant key to success in his 43

Jason Alexander knows a thing or two about marriage .

The “Seinfeld” star, 65, who has been married to Daena Title since he was 22, says there are a few factors that contribute to a successful union .

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“A piece of it is dumb luck. She walked in the door. I went, ‘Oh my God.’ She went, ‘Eh,’” he recently joked while appearing in an interview with social media star William Rossy of Sprouht.

“The opportunity to meet someone that kind of really does line up spiritually with you, it’s dumb luck,” he continued.

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Alexander, of course, gained fame playing George Costanza on “Seinfeld,” a character who constantly had problems with women he dated. In real life, the e