By Nicole Rojas ( | First Posted: Jul 28, 2013 07:46 PM EDT

Mae Whitman as Amber Holt, Matt Lauria as Ryan York (Photo : Vivian Zink/NBC)

NBC's popular drama "Parenthood" is just a few weeks from premiering its fifth season. Fans are eagerly awaiting to find out what will happen to the Braverman clan. As the new season draws closer, we've got you covered on the latest spoilers and cast updates.

The latest cast news includes two new additions to the growing list of guest stars this upcoming season. TVLine is reporting that "Office" alum David Denman and "Friday Night Lights" vet Jurnee Smollett have nabbed major recurring roles in season five.

Denman will play Ed, a "newly unemployed stay-at-home dad," who bonds with Julia (Erika Cristensen) while they volunteer at their kids schools. Could Ed present yet another distraction to Julia and Joel's (Sam Jaeger) marriage? As previously reported, the two will hit a snafu when Julia becomes jealous of Joel's new work wife Meredith (guest star Sonya Walger).

Jaeger told TVLine that the additions of Denman and Walger should worry Julia-Joel shippers. "There's a major role reversal in the fact that these construction opportunities are suddenly coming Joel's way. We're going to see the dynamic change a lot."

Meanwhile, Smollett will play Heather Hall, who is described as "a smart, feisty, up-and-coming political dynamo," who is hired by Kristina (Monica Potter) for her mayoral campaign. Kristina will plunge back into her political career after fighting her breast cancer last semester. According to TVLine, Smollett's role will be a major recurring one.

In other "Parenthood" news, it looks like Amber (Mae Whitmore) and Ryan (Matt Lauria) will not only be getting engaged, they'll also be looking for wedding venues. According to TVLine, show executive producer Jason Katims was vague on whether the wedding would actually take place.

"Parenthood" season 5 premieres on Thursday, September 26 at 10 p.m. on NBC. This will be "Parenthood's" first full 22-episode season.

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