Princess Anne first became a grandmother when her son and daughter-in-law, Peter and Autumn Phillips, welcomed Savannah on Dec. 29, 2010. The couple then had a second daughter, Isla, on March 29, 2012, and Anne's daughter and son-in-law, Zara and Mike Tindall, later welcomed Mia Grace on Jan. 17, 2014. The family expanded in June 2018 when Zara welcomed baby number two, Lena Elizabeth!