When a baby arrives in a family, it will definitely bring joy to its members just like in the reality and TV star's family, Tiffani Thiessen who just welcomed her second baby last week and of course the new mom is happy with her husband Brady Smith, but the one person who seemed to be really having the time of her life is Thiessen's firstborn daughter Harper.

Since last week, the White Collar actress, Thiessen has been treating her followers to her series of posts on her social media showing beautiful moments between her firstborn daughter Harper and her newborn baby boy, Holt. The photos are showing happy and sweet moments between the two siblings.

In the most recent photo that the second-time mother and former Beverly Hills 90210 star posted on her Instagram showed Harper carrying once again her brother Holt while laying down on a bed filled with white sheets. It was a sweet sight as Harper laid down with her blonde hair to one side while wearing a white outfit and both her hands carrying baby Holt who was wearing a printed navy onesie.

"Harper can't get enough of her baby brother. #Familytime," Thiessen wrote as a caption to the sweet photo. Indeed five-year-old Harper can't get enough of baby Holt as Thiessen again posted another photo of the two, this time it was both their nap time.

"My heart could not be more full of love for these two. #weareblessed," she wrote of the photo with her two children in an embrace while they were deep asleep. Even the second-time dad, Smith is so fond of his new son posting a photo of him holding his newborn writing, "Feeling incredibly grateful & blessed at the moment. #sweetbabyboy," as caption to his Instagram post.

Indeed the family of actress Thiessen is growing in numbers and in love with each other.