On 31st of December, Kate got married to Chris Robinson after being in love with him for several years. Chris Robinson is the lead singer of the rock and roll band The Black Crowes. As a married couple, they also had one child together. They also used to travel together during her film shooting and his musical tour. But in the mid 2006, her publicist revealed that they are separated and they finally got divorced on 25th of October 2007. Irreconcilable differences was claimed to be the main reason for this divorce.
In the early 2010, Kate began her romantic love affairs with Matthew Bellamy. Matthew Bellamy is also a great singer, musician and songwriter. He is popular for being the lead singer of the rock band Muse. After being in love for about a year, they got engaged in April 2011. She also gave birth to their first child together in July. They promised to get married soon but this engagement was dissolved at the end of 2014.
Kate received her formal education from Crossroads. There she learned more about arts and dramas. She graduated from there in 1997. After graduating from there she got an offer to join New York University but she chose to pursue her acting career. She has been active in acting since 1996. That year, she appeared in the TV series, Party of Five playing the role of Cory. Later in 1998, she appeared in the movie Desert Blue. She also starred in the movie Ricochet River that year. Her breakthrough role came in 2000 after she starred the role of Penny Lane in the comedy-drama film, Almost Famous. In 2009, she appeared in the movie Bride Wars and for this role she earned the salary of $7,000,000. Her net worth is said to be around $38 million.