Jennifer Garner, 46, flashes incredibly muscular arms in bright red dress at recent appearance

The Alias star stunned everyone as she has buffed up for a role. She is said to have worked out every day with a personal trainer to prepare for the role.

On Tuesday evening, Jennifer Garner flashed her buffed body at the STXfilms event at CinemaCon at Caesars Palace in Las Vegas, Nevada. Daily Mail has the details.

The 46-year-old actress told People that she was in a fairly good shape going into the movie and that “it actually felt good” to get even more toned.

The mother-of-three did not look like she had kids at all as she walked across the stage at Caesar’s. She looked half her age while flaunting her new toned body. Even her legs looked incredibly powerful and her waist was tiny.

She looked radiant in red frock by Roland Mouret, which featured a V-neckline, contrast straps, and a flowing assymetic skirt. She completed the look with a pair of black barely-there sandals and delicate jewelry.

The actress had been prepping for a starring role in the film Peppermint, which is a revenge story.

According to Variety, the film is about a woman whose husband and daughter were gunned down in a drive-by. The woman wakes up from a coma and spent years learning to become a lethal killing machine so that she can one day get her revenge.

On the 10th anniversary of the deaths, she targets everyone she deemed accountable including the gang that committed the act, the lawyers that got them off, and the corrupt cops that enabled the murders.

Jennifer told the audience that the storyline twist of the film made her interested because she would not “just do action for the sake of action.”

“There is no bigger stake than your children. There’s no bigger reason to get out and get into really good shape and then kill people!”

Jennifer has three kids with her ex-husband Ben Affleck—Violet, 12, Seraphina, 9, and Sam, 6.

The movie also stars Tyson Ritter, Annie Ilonzeh, and Method Man. It is set to be released in theaters on September 7.