The Hot Pursuit star turned 40 years old on Tuesday (22Mar16) and the blonde's entry into her forties was made even more special by her husband Jim Toth, who she tied the knot with on 26 March, 2011.

Reese couldn't contain her delight over their union on Saturday (26Mar16), the date of their fifth marriage anniversary, taking to Instagram to share the love by posting a black and white photo of herself sitting next to Jim with their hands interlocked.

"Happy anniversary to my sweet husband! I love you, JT! #5years," she wrote in the caption for the sweet image.

Reese and 45-year-old talent agent Jim are parents to three-year-old son Tennessee, while the actress also shares 16-year-old daughter Ava and 12-year-old boy Deacon with her ex-husband, Cruel Intentions co-star Ryan Phillippe.

It's claimed Reese and her current spouse Jim are a match made in heaven.

"Since marrying Jim, Reese is transformed," a source told People magazine. "Even now, she often gets giddy when she talks about him. They very much complement each other."

Meanwhile, Reese's loved ones have been going out of their way in the past few days to wish her a happy 40th birthday.

Several high-profile guests, including Jennifer Aniston, Kate Hudson, Nicole Kidman, and Matthew MCConaughey, celebrated her special day by attending a birthday bash she threw in Hollywood last weekend (19-20Mar16). At the party, Reese performed with country musician Keith Urban and was stunned by a surprise performance from Taylor Swift.