This is a case of lookalikes being separated by time. It's also another opportunity for movie producers to select an inspired mother/daughter combination for a future film and have the family resemblance appear to be convincing! Looking at pictures of a younger Alicia Silverstone, it's impossible not to be reminded of 'Twilight' star Kristen Stewart as she looks today; especially when Stewart wears her hair long.
It seems like every successful film from years ago is getting a remake these days, and if anyone out there is thinking of doing a modern take on 'Clueless', Stewart is the obvious choice for the part, if the famously pale actress can be persuaded to spend a while catching a tan before she starts filming. Both actresses spend a lot of time advocating for causes they believe in; Stewart for LGBT rights, and Silverstone for animal rights and environmentalism.