Rebecca Adlington acts as bridesmaid for sister Chloe just weeks after marriage split... and estranged husband Harry is also one of the guests

Rebecca Adlington announced her split from husband Harry Needs last month.  

So the 27-year-old Olympian's role as bridesmaid at her sister Chloe's wedding on Saturday could have dredged up some painful memories. 

In two stunning Instagram posts, Rebecca posed in a bold blue gown, first with her 10-month-old daughter Summer and later the stunning blushing bride.