According to the site, Lake, who cited irreconcilable differences, filed the papers on Oct. 16, just one week after the couple separated on Oct. 9.
Lake's filing appears to be gracious — TMZ reports the host is offering to pay Evans, a jewelry designer, spousal support.
Evans and Lake first stepped out together in the summer of 2010. The couple got engaged a year later in August and eloped in April the following year.
Lake was previously married to Rob Sussman for 10 years; they divorced in 2004. Together they share children Milo, 17, and Owen, 13.