Article continues below advertisementNicole Richie's daughter seems to have changed her name.The actress, 44, shared a sweet social media post in honor of Harlow Winter Kate's 18th birthday on Monday, January 12.However, the account she tagged indicated that the teen no longer goes by "Harlow."Article continues below advertisementSource: @nicolerichie/InstagramHarlow Winter Kate just turned 18."18 years of you ♥️🎂 @katemaddennn," Richie captioned her post. Her husband, Joel Madden, commented, "That's my girl ❤️✨.