FX's intense biker drama Sons of Anarchy has had a number of guest stars already this season (including former Disney star Ashley TisdaleCommunity's Joel McHale, and a surprise appearance byJustified's Walton Goggins), but here's another one you might not have expected: Dave Navarro of Jane's Addiction will be making an appearance in the final two episodes this year.

In related FX news, Jason Mantzoukas (known to many as Ruxin's batshit crazy brother-in-law Rafi from the FX fantasy football comedy The League) will be joining the cast of Modern Family this season as Hayley's (Sarah Hyland) boyfriend, who is also her co-worker and a jeans designer.  If Mantzoukas brings one-tenth of the ridiculousness of Rafi to this new character, I can't wait.  But does that mean goodbye to Dylan (Reid Ewing)?  In the meantime, hit the jump for more specifics on each of these new characters' roles.

According to THR, Navarro's Sons of Anarchy character will be a gang member connected to Nero Padilla (Jimmy Smits).  Additionally, his band, Jane's Addiction, is said to be doing a cover of "Sympathy for the Devil" for the final episode. It's unlikely that Navarro will have such an explosive appearance as Goggins, who showed up in makeup and with breasts to partake in some S&M blackmail, but the role is sure to be interesting (and one can presume bloody). [Editor's note: Be sure to catch up on Allison's Sons of Anarchy episode recaps here.]

As for Mantzoukas, he's not the only League actor to appear on Modern Family this season -- Paul Scheer will also guest star as a Costco manager who comes up against Claire (Julie Bowen) and Gloria (Sofia Vegara).  In addition to Mantzoukas and Scheer, Matthew Broderick and Shelley Long will also have roles this season. BridesmaidsWendi McLendon-Coven also just had a fantastic turn in the series as part of lesbian couple who are at odds with Cam (Eric Stonestreet) and Mitchell (Jesse Tyler Ferguson).

Sons of Anarchy airs Tuesdays at 10 p.m. on FX; Modern Family airs Wednesdays at 9 p.m. on ABC.