Good news for Ugly Betty fans might be bad news for Turtle on Entourage.

Jamie-Lynn Sigler, who has played a version of herself on the HBO hit for the last few episodes, is joining the cast of Ugly Betty.

According to Entertainment Weekly, she'll take on the recurring role of Natalie, Daniel's sexy, funny new assistant.

It looks like this photo does signify the end of Turtle and Jamie-Lynn on Entourage. So sad.

Natalie replaces Betty, who was promoted to features editor in last May's season finale.

Sigler will debut in the two-hour season four premiere on October 9. Good casting addition, fans?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.