Hilary stepped out in a casual ensemble with black jeans and a black sweatshirt.
The former Disney Channel star teamed her look with white Converse sneakers.
The young newlywed who married Canadian hockey player Mike Comrie in August last year was out and about today and appeared to be understandably a little down in the dumps as she ran errands in the California sunshine.
She wore a hippie-inspired outfit of flared jeans and a white crocheted top but did not raise much of a smile.
After What a Girl Wants hit the big screen, everyone wanted to know who the British babe was that played Amanda Bynes' love interest, Ian Wallace.
Lucky for Oliver fans, he is now starring in a new teen flick alongside Hilary Duff.
The duo, who had a brief three-month relationship that ended in March, have recently been spotted spending time together again.
The Coming Clean songstress was previously married to hockey player Mike Comrie who she divorced last year.
The two co-parent their darling five-year-old son Luca.
The actress and singer is also now an author and recently published her first novel, Elixir.
And Hilary Duff has rekindled her love for singer Matthew Koma, 30, as the two were spotted holding hands and kissing at a local farmer's market in Studio City on Sunday.