Jamie Lynn Spears reacts to Britney Spears' pregnancy news

Jamie Lynn Spears has reacted to Britney Spears' pregnancy announcement amid their ongoing family feud. MORE: Jamie Lynn Spears inundated with support after sharing heartbreaking hospital photoThe Sweet Magnolias star was one of the first to like her sister's baby news when she posted on Instagram on Monday.

What's more, Britney's news was announced on Jamie Lynn's daughter Ivey's fourth birthday. VIDEO: Jamie Lynn Spears opens up about her feud with sister Britney Spears  The proud mom shared a number of photos throughout the day, including many tribute messages to her youngest child.

MORE: Jamie Lynn Spears opens up about relationship with sister Britney Spears' sonsMORE: Britney Spears' sister Jamie Lynn Spears shares adorable picture as family marks major milestoneSo far, the rest of the Toxic hitmaker's family have stayed silent. Britney is reportedly expecting her third baby, her first with fiancé Sam Asghari.

Jamie Lynn Spears liked Britney Spears' pregnancy announcement The award-winning singer shared a cryptic message talking about her fluctuating weight, and what initially turned out to be a message of body positivity turned into a pregnancy reveal. MORE: Jamie Lynn Spears shares surprising message with fans amid Britney Spears conservatorship caseMORE: Britney Spears' sister Jamie Lynn Spears breaks silence with emotional speechShe wrote: "I lost so much weight to go on my Maui trip only to gain it back … I thought 'Geez … what happened to my stomach???' My husband said 'No you're food pregnant silly!!!'Jamie Lynn and Britney are currently not speaking "So I got a pregnancy test…and uhhhhh well…I am having a baby… 4 days later I got a little more food pregnant.