Kate Greer, originally from Marshaltown, Iowa and a former intern of relationship columnist Julia Allison, is dating Twitter founder Jack Dorsey again.

Back in 2010 they were seen together at many New York City red carpet events, but Dorsey had since then entered a relationship with British supermodel Lily Cole. In January of this year they were seen aboard Jack’s yacht in St Barts in the Caribbean, but reportedly broke up in February.

In June, Dorsey went on holiday to Japan with Kate. It seems the two have sparked their relationship back to life. Kate who is 28, posted pictures and a video of herself cuddling up to Jack in the Tokyo districy of Golden Gai.

Dorsey, who founded Twitter in 2006 and online mobile payment service Square, Inc. was seen this July with the pretty  New Yorker at the annual Allen and Company Sun Valley Conference in Idaho. Jack and Kate were casually dressed as they mingled with executives from media, finance and politics.

When Kate was a student at The University of Missouri , she was one of the best runners of her senior year in 2006. She was very involved in Community service while there. Now she is involved with Campinteractive, a not for profit organization that empowers inner-city youth through the inspiration of the outdoors and the creative powers of technology.

Today, Jack Dorsey and his co founders of twitter, Evan William and Biz Stone, are set to go public and look to vastly increase their wealth. Will this affect the relationship between Jack and Kate?  Kate seems like a great person, so we hope not.