The 36-year-old had the company of actresses Charley Webb, Sheree Murphy, Shobna Gulati and actor Antony Cotton, reports contactmusic.com.
Marsh later wrote on Twitter about her gala time.
“Having an amazing time for my hen do! Just got back from a fab day in the sun, now gettin’ ready to party party! Missing my J and babas tho!” she wrote.