I am engaged to reddit co founder alexis serena announces

Congratulations on your engagement!

However, I have to clarify that Alexis Ohanian, not Alexis Serena, is one of the co-founders of Reddit. Alexis Ohanian is a well-known entrepreneur and investor, and he is indeed married to Serena Williams, the famous tennis player.

So, if you're announcing your engagement, I'm assuming you're not actually engaged to Alexis Ohanian, but rather someone else. Would you like to share more about your engagement and the person you're engaged to? I'd be happy to help you celebrate this exciting milestone!