Hilary Duff threw a baby shower for her sister at the weekend.

The 27-year-old actress - who has son Luca, two, with estranged husband Mike Comrie - teamed up with her mother Susan Colleen to invite around 40 friends and family members to celebrate older sibling Haylie Duff and her husband Matt Rosenburg's impending new arrival, and the mother-to-be had the ''best day''.

She wrote on Instagram: ''Had the best day celebrating our baby. Coco chillin in my flower crown...#MHBabyLove. (sic)''

The celebration took place at Hilary's house on Saturday (07.03.15) and guests including Lauren Conrad, Kaley Cuoco, Jenna Dewan-Tatum, Ali Fedotowsky, Lacey Chabert, Beverly Mitchell, and Joanna Garcia tucked into pink donuts, cake pops, cupcakes and ice cream.

And the group also enjoyed using a floral station, where they crafted bouquets in mason jars and made garlands for their hair.

Hilary tweeted afterwards: ''Sissy @haylieduff you are the most beautiful sister/mom to be and I love you so much! Happy baby shower day! Thank you to so many for coming and a big thanks to @donatiennela @hannahskvarla @ashleybeverly @thecrowncollective @lowenban @realjoseph #mhbabylove (sic)''.

Haylie, 30, first announced she was expecting a baby of her own on Instagram back in December.

She captioned an image of some baby Nike Jordan trainers: ''Happiest girl in the world! Finally can let everyone know that Matty @mr_sts and I are expecting! #BabysFirstJordans. (sic)''