Amanda Seyfried Reveals She's Pregnant After Quickie Engagement To Actor BF

Surprise, everyone! Amanda Seyfried is having a baby.

The 30-year-old actress revealed the good news on Tuesday night to People during a press event for Givenchy's new fragrance, which she's a spokesmodel for.

At the event, she was wearing a sheer Givenchy dress that showed off her cute lil' baby bump.

It looks like our favorite "Mean Girls" mouse is growing up before our very eyes. She's definitely come a long way since then, though.

Not only is the actress pregnant, but she's also newly engaged to Thomas Sadoski, her co-star from "The Last Word," DailyMail.com reports.

Apparently, suspicion grew in March that the actors were becoming romantic with one another, but their relationship wasn't confirmed until May.

Six months later, they became engaged and revealed their baby is on the way.

That was... quick. But we're so happy for you, Amanda!

A source reportedly spoke with US Weekly and confirmed the news, saying,

Tommy and Amanda recently got engaged and shared the happy news with family and close friends.

Although this will be Seyfried's first time getting married, it'll be her fiancé's second. Sadoski was already married to Kimberly Hope for eight years, but they allegedly split back in 2015.

However, since Seyfried has already acted in tons of weddings throughout her career in showbiz, she is refusing to wear a white dress down the aisle.

According to DailyMail.com, she stated,

I got married so many times in my life on-screen. I don't want a white dress! I've worn so many of them. [...] The fact is, that kind of stuff is less about the ceremony and more about the commitment. So it's like children. That's where it's at, right? For me. But it's different for everybody.

You do you, Amanda. We're in full support!

But I do hope her fiancé and soon-to-be baby daddy likes dogs because Seyfried definitely has a soft spot for her pup.

Her Instagram is chock full of photos of him. We'll be patiently waiting for some newborn pictures now.

Citations: PEOPLE, DailyMail.com